Tree planting conditions: species, size and maintenance

A tree planting condition on a planning permission usually asks for four things: a planting plan and species schedule, a specification covering stock size and planting method, a programme tied to the first available planting season after completion, and a maintenance period during which failures must be replaced. Discharge it properly and it disappears from your life. Discharge it with a hand-drawn plan and a list of common names and you will be back twice.

The condition matters more than its wording suggests. On a self-build plot the planting is often the last thing anyone thinks about and the only outstanding obligation standing between you and a clean title.

What the condition normally requires

Read the wording before assuming. Landscape conditions come in two shapes, and the difference is whether the detail was approved with the application.

Where a landscape scheme was submitted and approved, the condition simply requires the works to be carried out in accordance with the approved drawings, within a stated period, with replacement of failures. There is nothing to discharge, only to do.

Where detail was reserved, the condition requires a scheme to be submitted and approved before a trigger, usually before work starts above slab level or before first occupation. That is a discharge of conditions application with its own fee, set by the national fee regulations and indexed annually, so check the current figure rather than the one you paid last year.

The trigger matters. A condition requiring approval before any development begins has to be satisfied first, and starting work without it puts the whole permission at risk rather than just the planting.

Species selection and provenance

Officers look for three things in a species schedule: that the species suits the soil, exposure and space available, that it reflects local character where the site is in a sensitive landscape, and that the mix is not a monoculture.

Write the schedule with botanical names. Common names are ambiguous, and a tree officer who reads "maple" cannot tell whether you mean a field maple that belongs in a hedgerow or a Norway maple cultivar that will outgrow a front garden.

Provenance and biosecurity have become part of the conversation. Stock grown in the United Kingdom reduces the risk of importing pests and diseases, and specifying UK-sourced and grown material is now common practice on public and larger private schemes. Ask for plant passports and keep them, because they are the simplest evidence that the stock is what the schedule said. Where the planting also counts towards mandatory biodiversity net gain, the species and habitat type have to match the entry in the statutory metric, so the Biodiversity Net Gain Assessment and the planting schedule need to agree. That assessment must be completed by a competent person under the Environment Act 2021 regime, and an AI-assisted draft is a starting point for them.

Right tree, right place is not a slogan here. A species whose mature spread exceeds the space available will be pruned hard within fifteen years, which defeats the purpose of the condition.

Nursery stock sizes and what they mean

Stock size is specified in trade terms, and the terms are precise even though they sound informal.

Standards are graded by girth bands, running from light standard upwards through standard, selected standard, heavy standard and extra heavy standard. A larger figure means a bigger tree, a heavier rootball and more expensive handling, and it also means slower establishment, because a large tree loses more of its root system when it is lifted.

That last point is worth making to clients who want instant effect. A heavy standard looks better on the day it goes in and will often be overtaken within a decade by a light standard planted alongside it, provided both are watered. On a condition discharge, specifying a modest stock size with a credible establishment regime is a stronger submission than a large tree with no watering plan.

Root condition belongs in the specification too: bare root, rootballed, air-potted or container grown. Bare root is the least costly and goes in during the dormant season only.

Planting seasons and practical timing

Bare root stock is lifted and planted between late autumn and early spring, while the plants are dormant. Rootballed stock has a similar window with a little more latitude. Container stock can go in at any time of year, with the caveat that summer planting needs committed watering.

Conditions usually require planting in the first available planting season following completion or occupation, which in practice means the following winter. Two things go wrong with that.

A development completing in May has months to wait, and planting pits get used as a materials store in the meantime. And where the landscape works depend on finishing the external levels, a slipping build programme pushes planting into a second season, which is a breach unless you ask for a variation.

Protect the planting positions during construction, and tell the contractor that the topsoil in the landscape areas is part of the works rather than a convenient place to park.

The maintenance and replacement period

Most landscape conditions impose a maintenance period of around five years, with an obligation to replace any tree that dies, is removed or becomes seriously damaged or diseased, in the first available planting season, with the same species and size unless the authority agrees otherwise.

Build a watering regime into the specification and into whoever's contract carries it. Summer water stress in years two and three kills more planted trees than any defect at planting, and a replacement tree planted into the same unwatered pit will die the same way.

The maintenance obligation needs a named party on a self-build. Where the house is sold during the period, the obligation runs with the land, and a buyer who does not know about it will not water anything. A short note in the sale pack costs nothing.

Hedgerow and shrub planting has its own replacement logic, including gapping up rather than wholesale replacement, which we cover in our note on hedgerow gapping up, translocation and replacement.

Evidence that discharges the condition

Submit a package rather than a drawing. A discharge application that lands complete is usually determined without correspondence.

1. A planting plan at a readable scale showing each tree position, numbered, with the species and stock size labelled or keyed.
2. A species schedule with botanical names, quantities, stock types and sizes, and provenance.
3. A planting specification covering pit preparation, soil amelioration, backfill, staking and tying, mulching and watering.
4. A Landscape Strategy or short covering statement explaining how the scheme responds to the condition and to any design guide.
5. The maintenance and replacement regime with frequencies and the responsible party.
6. For completed planting, an as-planted drawing, photographs and the plant passports.

Where the planting interacts with existing protected trees, check that the new positions do not sit inside a root protection area and that nothing in the planting scheme conflicts with a separate tree consent, a problem examined in our note on when a planning condition and a TPO consent collide.

What happens if the planting fails

Failing to comply with a condition is a breach of planning control. The authority can serve a breach of condition notice under section 187A of the Town and Country Planning Act 1990, and there is no appeal against one, only compliance or prosecution.

In practice councils rarely prosecute over a dead tree, and the more common consequences are commercial. A solicitor acting for a buyer will raise outstanding conditions. A lender releasing a final stage payment may ask. And a future application on the same site arrives in front of an officer who remembers.

The straightforward answer is to replace failures promptly and keep the record. Photographs with dates, invoices and a short note of what was replaced and when turn a potential dispute into a two-minute conversation.

This is general guidance rather than legal advice. Check the exact wording of your condition with your local planning authority or a qualified professional before relying on it.

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