Skip to content
Trades in practice

Interior plantscaping: a winter service for office clients

Interior plantscaping as a landscaping service: what the office plant study shows, what sites, escape routes and care contracts need, and how the page sells it.

20 min read InnenraumbegrünungGewerbekundenLeistungsseiteWinter

In short and in plain language

In winter, a lot of garden work stops. The law calls the time from December to March the bad-weather period.

Plants in offices need care in winter too. They stand in warm rooms. The weather outside does not matter for them.

A study from 2014 found that people in offices with plants got more work done. It was a test in a few offices. It is not a promise for every office.

Plants hardly make the air in a room cleaner. For that you would need a huge number of plants.

We build websites on which garden firms explain this work honestly and clearly.

From December, many landscaping sites go quiet. Frost, rain and short days slow down outdoor work, and German social law even has its own term for it: the period from December 1 to March 31 is the bad-weather period (§ 101 SGB III). Offices, medical practices and law firms, on the other hand, are warm, and they are full of plants that need water, light and care whatever the weather outside. For landscaping firms, interior plantscaping with a care contract is therefore a service that brings work in winter in particular and runs all year round. This article shows who awards such contracts, what a widely cited field study on plants in offices actually measured, what matters for light, temperature and escape routes, how buying, renting and care contracts differ, and how a service page explains all this to commercial clients without promising more than the plants can deliver.

Key takeaways

  • The bad-weather period runs from December 1 to March 31 (§ 101 SGB III). Interior plantscaping with a care contract does not depend on the weather and gives care teams plannable work at client sites in these four months.
  • In a field study in large offices in the UK and the Netherlands, productivity rose by 15 percent after plants were added to bare offices (University of Exeter 2014). On a service page, the figure belongs next to the study design, not in a promise.
  • Air purification is no selling point: matching the effect of normal air exchange would take 10 to 1,000 potted plants per square meter of floor space (Cummings/Waring 2019).
  • Every quote starts with a site visit and a light reading: office workstations call for at least 500 lux, corridors for 50 lux (ASR A3.4), and planters must not narrow escape routes below their minimum clear width (ASR A2.3).
  • With rented plants, the lessor has to keep the rented item in a condition fit for the agreed use during the rental period (§ 535 BGB). Replacing sick plants therefore belongs in the rental price, not in an extra invoice.
  • As a rule, anyone applying plant protection products needs a certificate of competence and an approved refresher course within every three years (§ 9 PflSchG). Care visit, log and pest control belong on the service page in concrete terms.

Why interior plantscaping fits the winter

Landscaping is a seasonal business, and German social law takes this into account. Employees of businesses affected by seasonal loss of work are, subject to further conditions, entitled to seasonal short-time allowance in the period from December 1 to March 31 (§ 101 SGB III). A separate ordinance makes clear that landscaping is included: it expressly lists landscaping businesses that carry out work such as building gardens, parks and green spaces (§ 1 para. 4 Baubetriebe-Verordnung).

The industry itself helps fund this system. The winter employment levy for landscaping businesses amounts to 1.85 percent (WinterbeschV) of the gross pay of manual workers subject to the levy. The seasonal short-time allowance cushions a loss of work, but it does not replace a job. As a rule, an hour of work spent at a client's office in January is worth more to a business than a well-cushioned loss of hours in the yard.

Interior plantscaping does not depend on the weather. The plants stand in heated rooms, the care visit happens in sleet just as it does in July, and routes can be planned weeks ahead. Even so, the title of this article calls it a winter service only with a caveat: a care contract for office plants runs all year. Its strength in winter is that it keeps running during the months when little happens outdoors, and that it keeps skilled staff in the business who will be needed again in spring anyway. On top of that, winter is when site visits for new indoor jobs fit into the calendar.

For the website, this sets a clear order. The interior plantscaping page should go online in the fall, when many companies plan the year ahead and offices are refitted after moves or renovations. How such a topic plan spreads across the year is shown on the page on seasonal planning for your website, and the other jobs for the quiet season are covered in winter topics for your website.

Who hires someone for office plants

The core clientele of German landscaping firms is not in offices. Nearly 57 percent (BGL) of industry revenue came from private gardens in 2025, and public contracts accounted for 21.23 percent (BGL). Industry as a client accounted for 6.07 percent (BGL), housing construction for 8.92 percent (BGL). Commercial clients outside housing are therefore a small block in these statistics, and interior plantscaping does not appear in them as a service of its own.

That is exactly what makes the service interesting, because anyone looking after offices deals with clients who decide differently from private customers. They compare written quotes, want a fixed monthly line in the budget and expect the provider to show up without anyone in the building having to remind them. A website that addresses these expectations speaks to them more directly than photos of garden ponds. Three groups of clients can be distinguished:

Offices and administration

Reception, meeting rooms and open-plan areas. The contacts are management, office managers or facility management, and what they want is a care contract with a fixed monthly line.

Medical practices and law firms

Waiting rooms and reception are the business card. Plants should be easy to care for, unobtrusive to look after and tended outside office hours.

Property managers and landlords

Lobbies, stairwells and shared areas in office buildings. Here the indoor plants can be bundled with the care of the grounds in a single contract.

For property managers, billing is a topic of its own, covered in detail in the article on landscaping costs in tenant service charges. Whether the cost of indoor plants can be passed on to tenants is a question for the lease, not for the care company. The company helps the manager by showing indoor and outdoor care separately on the invoice and assigning every item to a property.

What the field study shows and what it does not

Hardly any figure is quoted as often in connection with office plants as this one: plants in a previously bare office increased productivity by 15 percent (University of Exeter 2014). It comes from research by Marlon Nieuwenhuis (Cardiff University), Craig Knight (University of Exeter), Tom Postmes (University of Groningen) and Alex Haslam (University of Queensland), which the University of Exeter reported on in September 2014.

Anyone who wants to use the figure should know how it came about. The researchers compared bare offices, stripped of decoration in line with the lean office idea, with offices that had plants. Three field experiments (Journal of Experimental Psychology: Applied 2014) in large offices in the Netherlands and the UK were published; two of them (Journal of Experimental Psychology: Applied 2014) ran over the following weeks and months. According to the press release, productivity was monitored over months in two large offices (University of Exeter 2014) in the UK and the Netherlands. Besides productivity, the study mainly measured how employees perceived their workplace: air quality, concentration and workplace satisfaction.

This also makes clear what the study does not show. It does not show that every office with plants becomes 15 percent more productive, and it says nothing about how many plants of which kind are needed in which place. It compared bare rooms with rooms that had plants, not an already comfortable office with an even greener one. And it dates from 2014. For context, the report also notes that an interior plantscaping company was involved in the study. That does not make the results wrong, but it belongs in the picture when a business advertises with the figure.

Even more caution is needed with a second popular argument: plants clean indoor air. A review of 12 published chamber studies with 196 experimental results (Cummings/Waring 2019) came to a sober conclusion. Removing as many volatile organic compounds from the air as a building's normal air exchange already does would take 10 to 1,000 potted plants per square meter of floor space (Cummings/Waring 2019). The title of the paper sums it up in one sentence: potted plants do not improve indoor air quality.

For the service page, this means air purification is no selling point. Anyone who advertises with it makes claims about the results to be expected from use, and untrue or deceptive claims about these make a commercial practice misleading under German law (§ 5 UWG). What can be said is what the field study actually measured, with study design and year. Other points to watch in advertising claims are summarized in the article on advertising with prices and claims.

How the figure belongs on the page

Instead of "Plants make your team 15 percent more productive", write: "In a field study in large offices in the UK and the Netherlands, productivity rose by 15 percent after bare offices were fitted with plants (University of Exeter 2014). How plants affect your office depends on the room, the light and the care." The figure stays a study result, not a service promise.

Site survey: light, warmth and clear routes

For the planning, installation and care of interior plantscaping, the FLL publishes its own guidelines. The first edition appeared as early as 1997 (FLL), revised versions followed in 2002 and 2011 (FLL), and since 2024 the fourth version (FLL) has been available. Among the focal points of the revision, the FLL names the importance of a thorough site analysis. In practice, this means that the quote does not start with a plant list but with a site visit.

The most important criterion is light, and this is where the eye is easily fooled. For writing, reading and data processing, the German technical rule for workplaces specifies an illuminance of at least 500 lux (ASR A3.4), at least 300 lux (ASR A3.4) in the area surrounding such workstations and at least 50 lux (ASR A3.4) on traffic areas and corridors without vehicle traffic. These values are made for people. The German green building association BuGG puts it in a nutshell: what is enough for us humans is usually not enough for plants (BuGG). A corridor with artificial light is therefore a different site from a spot by the window, even if both look bright to the eye. During the site visit, the company takes a reading with a lux meter at the planned plant position, in winter ideally in the morning and in the late afternoon.

When it comes to temperature, offices are predictable. In workrooms with mainly seated, light work, the air temperature must be at least 20 °C (ASR A3.5) throughout the period of use, which means in January as well. According to BuGG, tropical plants suit rooms with constant temperatures of 20 to 25 degrees Celsius (BuGG), while rooms with strongly fluctuating temperatures are better planted with species from Mediterranean or subtropical zones. Drafts can cause drying out and leaf damage (BuGG), so entrance doors, glass fronts and ventilation outlets belong on the list during the site visit.

The third point is not a horticultural one, but it decides the position. The employer has to make sure that traffic routes, escape routes and emergency exits are kept clear at all times (§ 4 ArbStättV). The technical rule on escape routes requires that they stay clear in the required dimensions and sets minimum clear widths for main escape routes depending on the number of people in the catchment area, such as 1.00 meter for up to 20 people and 1.20 meters for up to 200 people (ASR A2.3). A planter in the corridor that narrows this width is not a design detail but a defect in the client's workplace. A company that raises this during the site visit shows that it sees more than plants.

Site factorRule or guide valueQuestion at the site visit
Light at the workstation500 lux for writing, reading, data processing (ASR A3.4)How bright is the plant position in the morning and late afternoon?
Light in the corridor50 lux on traffic areas and corridors (ASR A3.4)Is that enough for the plant, or does it need a grow light?
Temperatureat least 20 °C for mainly seated, light work (ASR A3.5)Are there drafts at doors, glass fronts or ventilation outlets?
Escape routes1.00 m clear width for up to 20 people (ASR A2.3)Does the width stay clear with the pot and a spreading plant?
Water and accessno guide value, set out in the contractWhere is there water, and when may the care team enter the building?

Buy, rent or care contract

For commercial clients, there are essentially three models, and each spreads the risk differently. Which one fits depends less on the plants than on whether the client wants to invest or pay a running rate, and on who takes care of a plant that dies despite care.

ModelWho owns the plantWho carries the riskSuits
Purchase with care contractthe clientreplacement as set out in the contract, otherwise invoicedclients who invest once and buy in the care
Rental with carethe companythe company, which keeps the rented item in agreed condition (§ 535 BGB)clients who want a fixed monthly rate without buying
Care of existing plantsthe clientrecord the starting condition before the contract beginsoffices that already have plants and need help

With rentals, it pays to look at the law. The lessor has to hand over the rented item in a condition fit for the agreed use and keep it in that condition during the rental period (§ 535 BGB). A company that rents out plants should therefore assume that a dead rental plant is its problem and not the client's, unless the contract validly provides otherwise. This belongs in the calculation: a rental price without a reserve for replacements is calculated too tightly. These notes are general in nature; for drafting contracts, legal advice is the right way to go.

With a purchase, it is the other way round. The plant belongs to the client, and the care contract sets out what the company owes: how often it comes, what it does and how a plant that dies despite care is handled. A clear rule in the contract helps here, such as replacement on fixed terms. When caring for existing plants, recording the starting condition is the first step, with photos and a short list for each position. How scope, frequency and term can be described cleanly in a care contract is shown in the article on offering garden maintenance contracts; the same principles apply indoors, just with different line items.

Costing without a price promise

A care contract for indoor plants is a standing order made up of small individual amounts, and that is exactly where the trap lies. The minutes spent at the pot are only part of the effort. On top of that come travel and the search for parking downtown, walking routes inside the building, signing in at reception, materials, fertilizer, substrate and the reserve for replacement plants. Anyone who only counts the time at the plant will lose money.

It makes sense to cost each property separately: number and size of pots, accessibility, frequency, a replacement rate based on your own experience and a surcharge for positions with difficult light or care visits outside normal working hours. With rental models, depreciation of plants and pots comes on top. The biggest lever is route planning: three offices in the same business park on the same morning are economically something different from three offices in three towns.

Prices only belong on the website in a form that holds true. A sample calculation with a date and assumptions can provide guidance, a flat starting price without details on frequency and term rather not. What to watch out for is covered in showing prices on your website, and the pricing page shows how packages and prices can look on a landscaping website. For services that commercial clients compare, a clear service description is often more helpful than a single number.

The care visit: watering, pruning, replacement

What the client gets for the money is decided in the care visit. It is the actual service, and it should be described on the page in such concrete terms that an office manager can compare it with another quote. A complete care visit includes this work:

  • Watering and checking water levels: check substrate moisture or the water level indicator in hydroculture and adjust the amount of water to light and season.
  • Pruning and cleaning: remove wilted leaves, trim to shape, clean dust off the leaves, clean pots and top dressing.
  • Checking for pests: look at the undersides of leaves and the shoot tips, spot infestations early and record them.
  • Replacement: replace plants that do not thrive in their position as set out in the contract, or move them to a better spot.
  • Fertilizer and substrate: fertilize as needed, top up substrate, check pots for waterlogging.
  • Log: record date, position, finding and measure, and make the log available to the client.

BuGG notes that documenting the care and inspection visits by the specialist company helps everyone involved to respond quickly to possible problems (BuGG). For the company, the log is also evidence. If a plant dies because the heating was reset or a filing cabinet was moved in front of the window, the log shows what was visible at the last visit. For the office manager, it confirms that someone was there, even if nobody watched the care visit.

Pest control is a delicate point. Anyone applying plant protection products needs a certificate of competence (§ 9 PflSchG) issued by the competent authority, and certified persons must attend an approved refresher or further training course within every three years (§ 9 PflSchG). The law names exceptions, among others for products approved for non-professional users in home and allotment gardens and for simple auxiliary tasks carried out under the responsibility and supervision of a person holding a certificate of competence. A company working in a client's office should not rely on the first exception, and helpers without a certificate of their own only take on simple auxiliary tasks under the supervision of a certified person. In rooms where people work, there are good reasons anyway to treat infestations mechanically or with beneficial insects first. What the company does here belongs in the contract and, in general terms, on the service page.

What belongs on the service page

Commercial clients read a service page differently from private customers. They are looking less for inspiration than for answers: what exactly is done, how often, on what terms, and whom do you call when a plant starts to droop. A dedicated interior plantscaping page, linked from the page on commercial grounds care and from the overview under services, answers these questions in a fixed order:

Opening with a room photo

A photo from a real project, approved by the client, shows more than any description. Below it, one sentence on who the service is for.

Scope of service

Planning, plants, pots, delivery and care. What the company does itself and what runs through partners is stated openly.

Three models

Purchase with care contract, rental with care and care of existing plants. Two sentences per model on ownership and replacement.

The care visit

Frequency, tasks and log. A sample log without client data makes the service tangible.

Site and safety

Site visit with light reading, a note on clear escape routes and on pest control with a certificate of competence.

Service area and enquiry

Towns where the company looks after offices, and a form that asks the questions for the site visit in advance.

For statements about effects, what was said in the section on the field study applies: the study may go on the page with study design and year, a promise of air purification may not. Photos come from your own projects. How to prepare them for the website is covered on the page on photos for your website, and a portfolio gallery with indoor projects is a convincing argument for commercial clients, because it shows that the company has done this work before.

Commercial clients use their own terms when searching, such as office plants, plant care or interior greenery. The page picks them up in the text, together with the towns of the service area. How such a page gets found locally is covered on the page on local SEO for landscaping.

The enquiry form for offices

A site visit takes time. So that it does not come to nothing, the form asks in advance the questions that would otherwise only be settled on site. The principles are on the page on the enquiry form for landscaping and in the article an enquiry form that qualifies. For interior plantscaping, these details help:

  • type of room: office, medical practice, law firm, lobby or meeting room
  • approximate floor space or number of workstations
  • light situation: window side, orientation, interior corridors
  • preferred model: purchase, rental or care of existing plants
  • photos of the planned positions, with a floor plan if available
  • contact person in the building and possible time windows for care visits

The last question matters more than it seems. In medical practices and law firms, care visits sensibly take place outside office hours, in offices before work starts or on a fixed weekday. Knowing this early lets the company plan its routes accordingly, and the client sees in the form itself that the company is thinking about their daily routine.

From the indoor job to the grounds

Interior plantscaping is rarely a big one-off deal, but it is a good door opener. A company that is in the building every month knows the contacts, sees the condition of the grounds and is part of the conversation when the care of green areas, entrances or roof terraces is put out to tender again. How such property contracts are won is described in the article on winning grounds maintenance contracts; companies that also offer roofs and facades will find the basics in green roofs and living walls.

In winter, this is easy to bundle. A company looking after offices with plants can approach the same client about trees on the company grounds, see fruit tree pruning in winter, or about winter service, where the question of gritting material has to be settled anyway, see road salt or grit. On the website, short cross-references connect the services without hiding interior plantscaping in the winter service text. A sensible roadmap for getting started looks like this:

Put the service page with models, care visit and service area online and add room type, light and time windows to the form.

In the end, this is a service that suits landscaping because it requires the same skills: knowing plants, assessing sites, coming back reliably. What sets it apart from outdoor care is the stage. In an office, every employee, every visitor and every client sees whether the plants are cared for. A well-described service page turns this visibility into an argument for the whole business.

This article is based on data from: University of Exeter (Why plants in the office make us more productive, press release of September 1, 2014, reproduced by ScienceDaily on September 2, 2014); Nieuwenhuis, Knight, Postmes and Haslam (The relative benefits of green versus lean office space: three field experiments, Journal of Experimental Psychology: Applied, volume 20, issue 3, 2014, abstract on PubMed); Cummings and Waring (Potted plants do not improve indoor air quality: a review and analysis of reported VOC removal efficiencies, Journal of Exposure Science and Environmental Epidemiology, published November 6, 2019); Federal Association of Garden, Landscape and Sports Ground Construction (BGL: GaLaBau statistics and industry data 2025); German Social Code, Book III (§ 101 para. 1); Construction Businesses Ordinance (Baubetriebe-Verordnung, § 1 para. 4); Winter Employment Ordinance (WinterbeschV, § 3 para. 1); FLL (guidelines for interior plantscaping, 2024 edition); German green building association (BuGG: interior plantscaping); Technical Rules for Workplaces ASR A3.4 (May 2023 edition), ASR A3.5 (June 2010 edition, last amended 2022) and ASR A2.3 (March 2022 edition, last amended 2024); Workplaces Ordinance (§ 4 para. 4 ArbStättV); German Civil Code (§ 535 para. 1 BGB); Plant Protection Act (§ 9 para. 1, 4 and 5 PflSchG); Act against Unfair Competition (UWG: § 5 para. 1 and 2). The legal notes are general in nature and do not replace an assessment of the individual case.

Related Articles

Trades in practice

Fruit tree pruning in winter: a service page for gardens

Fruit tree pruning as a winter service: the pruning window per LWK Niedersachsen, three types of cut, a form with height and photo, and prunings billed apart.

20 min read
Law and obligations

Road salt or grit: the winter service page by local bylaw

Road salt or grit? Where local rules are set, what they mean for sidewalk, steps and driveway, and how a winter service page explains them town by town.

22 min read
Trades in practice

Patio Construction: A Service Page That Compares Materials

Patio construction as its own service page: compare pavers, natural stone, ceramic, timber and WPC by care and base, plus a form that asks about site access.

18 min read