Checklists · Planting
Existing Plant Retention Decision Checklist
Help an owner list what is already growing, decide honestly what is worth keeping, and separate the retention decisions they can make from the ones that belong with a qualified arborist or the local authority.
7 sections · 42 planning prompts · educational owner-side preparation
https://www.builddesignhub.com/checklists/planting-and-garden-maintenance/existing-plant-retention-decisions · Build Design Hub — educational planning resource. Requirements vary by project and location.
Scope
What this checklist covers
The preparation ground these prompts walk through.
- Recording what is already growing before anything is cleared
- Separating what you genuinely value from what is merely familiar
- Spotting planting that is quietly doing a job nobody has noticed
- Protecting retained planting while work goes on around it
- Where a retention decision stops being yours to make on your own
Audience
Who this checklist is for
- Owners planning a garden project on a plot that is already planted
- New occupiers deciding what to keep from a previous owner's garden
- Households where one person wants to clear and another wants to keep
- Owners whose garden is about to be used as access for building work
Timing
When to use it
- Making one list of existing planting with a provisional intention beside each
- Recording which plants carry meaning for somebody in the household
- Preparing questions about moving, protecting or removing established plants
- Agreeing what must be protected while machinery and materials are on site
- Noting which plants may be doing a job that is not immediately obvious
Limits
When it is not sufficient
This is general planning preparation. These situations need a qualified professional, and often the relevant authority.
- Deciding whether a tree is sound, safe or ought to be removed
- Confirming what local consent applies to cutting back or clearing what is there
- Identifying disease, pests or the cause of decline in existing planting
- Judging whether roots are affecting a wall, a drain or a paved surface
The checklist
Work through the sections
Tick the boxes on paper or on screen — nothing is stored, so print the page if you want to keep your marks.
1.Listing what is actually there before anything moves
Retention decisions get made on site, in a hurry, by whoever is holding the tools. These prompts put the list together while there is still time to think.
Walk the whole plot with a notebook and record every established plant, including the ones you stopped noticing long ago.
Anything left off the list is effectively marked for removal, because nobody on site will pause over a plant that was never mentioned.
Photograph each item from a distance and again close up, since a photograph is the only thing that survives once something has been cleared.
Owners routinely want to know afterwards what was there, and recollection is a poor substitute when a replacement is being discussed.
Note where each plant sits in relation to a boundary, a path, a drain cover or a building, because position decides most of the questions that follow.
The same plant can be straightforward in the middle of a lawn and complicated against a shared boundary, and the difference is purely positional.
Record which items you cannot identify and mark them plainly as unknown, since a guess written in a list is treated as fact by everyone who reads it afterwards.
An honest unknown invites the right expertise, whereas a confident misidentification can send a whole decision the wrong way.
Putting a name to a plant, and anything that follows from that name, is work for a qualified horticultural professional.
Note anything growing through, over or under a boundary structure, including growth arriving from a neighbouring plot.
Plants on or near a line raise questions of ownership and consent that have to be settled before anyone starts cutting.
What may be cut on or across a boundary is a legal matter; discuss it with your neighbour and, where ownership is unclear, with a suitably qualified adviser.
Mark on the list which plants are visible from indoors and from which room, so the effect of removing one is understood before it happens.
A plant that is unremarkable in the garden can be the entire view from a kitchen window, and that only becomes clear once it has gone.
2.Separating what you value from what is merely familiar
Long-standing planting attracts loyalty it has not always earned, and sometimes the opposite. These prompts test each item honestly.
Put a provisional intention beside each item — keep, move, let go, or undecided — and accept that undecided is a legitimate answer at this stage.
Forcing every item to a decision early produces decisions made on impatience, and undecided items are exactly what a professional visit is for.
Note which plants somebody in the household would genuinely miss, and which are tolerated only because removing them has never come up.
Long tenure is often mistaken for value, and asking the question directly separates the two more reliably than debate on site.
Record any plant with a personal association, such as one planted by a family member, since these are the removals that cause the most lasting regret.
Regret after clearance usually attaches to something nobody thought to mention, rather than to a decision anyone actually took.
Consider whether a plant you dislike is disliked for what it is or for where it sits, because the second can sometimes be answered without removal.
Plenty of unwanted planting is simply in the wrong position, and separating the two questions widens the options available.
Write down which items you would keep only if keeping them turns out to be straightforward, and mark those as the ones you are willing to trade.
Naming your flexible items in advance keeps the difficult conversations focused on the ones that actually matter to you.
Ask each member of the household to mark the list independently before comparing, so the loudest opinion in the room does not settle it.
Independent marking exposes genuine agreement and genuine conflict, both of which are useful before a professional is involved.
3.Spotting the planting that is quietly doing a job
Some plants earn their place in ways nobody notices until they are gone. These prompts look for the work being done rather than the appearance.
Note which plants screen a window, a bin store, a parked car or a view into the garden, judged from the position where that view actually matters.
Screening is directional, and a plant that hides nothing from the lawn may hide a great deal from a particular seat or window.
Record anything growing on a bank, a loose edge or sloping ground, since vegetation there is often doing more than it appears to be.
Roots on a slope can be holding material in place, and that role only becomes visible once the planting has been stripped off.
Anything that may be holding ground in place should be looked at by a qualified professional before it is cut back or removed.
Note which planting takes the edge off wind across a seating area or a doorway, as you have felt it rather than as you assume it works.
Shelter is noticed only in its absence, and a windbreak removed in calm weather is regretted in the first gale.
Consider whether any planting shades a room, a paved area, a greenhouse or a water container that would behave differently once it has gone.
Removal changes the conditions on everything nearby, and those knock-on effects are rarely part of the original decision.
Record where planting hides something practical, such as a meter box, a cover or a service point, and note what has to stay reachable.
Access requirements sit with the relevant provider rather than with you, and planting is usually the thing that has to give way.
What has to remain accessible around meters, covers and service points must be confirmed with the relevant provider.
Note anything that birds, hedgehogs or other visiting animals use, and raise it before clearance is planned rather than after it starts.
Wildlife use is something only somebody who watches the garden regularly would know, and it changes when clearance may happen.
Birds and other wildlife may already be using this planting, and only the relevant authority can tell you what that means for clearance.
4.Where the tree conversation has to move to an arborist
Trees and large woody planting sit outside anything an owner can settle. These prompts prepare the conversation instead of trying to answer it.
List every tree on the plot and every tree close enough to be affected by what you are planning, including those standing in neighbouring gardens.
A neighbouring tree can constrain what you are planning as much as one of your own, and it needs to be in the conversation from the beginning.
Note anything you have observed about a tree, such as leaning, dead wood, fungus at the base or lifted ground, and record it as an observation to pass on.
Owner observations are genuinely useful to an arborist as a starting point, provided they are offered as observations and nothing more.
None of these observations tell you whether a tree is safe; only a qualified arborist can assess the condition of a tree.
Ask a qualified arborist what options exist besides removal, and record what you are told before settling on any plan that assumes a tree is going.
Removal is often the first idea an owner has and rarely the only one available, and the alternatives are not obvious from outside the profession.
Write down what you want the tree to stop doing, such as shading a room or dropping onto a drive, so the conversation starts from the problem rather than the solution.
A problem stated plainly leaves the professional free to propose something you would not have thought to ask for.
Ask what a retained tree needs around it, and what would have to be kept off the ground beneath it while work goes on.
Damage to a retained tree usually happens below ground during the works and shows above ground long afterwards.
Root protection during construction is a matter for a qualified arborist together with the professionals running the work.
Treat protection as unknown until the local authority has told you otherwise, and do not let a clearance plan proceed on an assumption either way.
Protection status has to be established before decisions are made, because it can rule out an option the whole plan was resting on.
Neither an owner, a contractor nor a neighbour can settle protection status; the local authority is the only source for it.
5.What moving an established plant actually involves
Moving something is offered as a compromise far more often than it succeeds. These prompts test the idea before anyone promises it.
Ask what moving a particular plant would involve and how likely it is thought to survive, before promising anybody in the household that it will be saved.
A promise made early is remembered long after the qualification attached to it, and the disappointment lands on whoever made it.
Note where a moved plant would go, and whether the receiving position offers anything like the light, shelter and ground it grows in now.
A move into worse conditions delays the loss rather than preventing it, and the new position deserves as much thought as the old one.
Record whether the plant would have to be lifted at a particular point in the seasons, and how that fits with the rest of the work.
The point in the seasons at which a plant can be moved often decides the order of the whole project rather than the other way round.
Timing for lifting and replanting depends on the plant and the site and is a judgement for a qualified horticultural professional.
Ask who is responsible for a lifted plant between coming out of the ground and going back in, and where it would be held while it waits.
Stock left standing on a hard surface in wind or sun deteriorates quickly, and responsibility for it is rarely stated unless somebody asks.
Ask whether a cutting, a division or seed could be taken from a plant you are attached to, rather than attempting to move the whole thing.
Continuity of the plant sometimes matters more to a household than the individual specimen, and that is worth establishing before a difficult lift.
Write down which plants you would accept losing in the attempt, so the risk is shared openly rather than discovered when the attempt fails.
Naming the acceptable losses in advance keeps a failed move from becoming a dispute about what anyone was told.
6.Protecting what stays while the work goes on around it
Most damage to retained planting happens during the works, not during the decision. These prompts set the ground rules before anything arrives on site.
Mark clearly on site, and not only on a drawing, which plants are staying, since the drawing does not travel with the person operating the machine.
Site marking is what actually protects a plant, and it needs to be legible to somebody who has never read the brief.
Agree in writing where materials, spoil and machinery may not be stored, naming the areas rather than describing them loosely.
Storage areas are decided by whoever arrives first unless they have already been agreed, and the ground chosen is usually the softest available.
Ask what protection retained planting needs during the work, who puts it in place, and who is responsible for keeping it there once it has been knocked over.
Protection that nobody has been made responsible for disappears early in the work, and its absence is noticed only at the end.
Protective measures on site are the responsibility of the professionals carrying out the work and should be agreed before anything arrives.
Note where washings from mixing, cutting or cleaning would run, and raise it before a spot is chosen by whoever gets there first.
Run-off from site activity finds the nearest bed, and the damage is usually attributed to something else entirely.
Where waste water and washings may be discharged must be confirmed with the professionals on site and the relevant authority.
Record the condition of retained planting before work starts, with dated photographs, so damage is not left as a matter of recollection.
A dated record made before work starts is usually the most reliable basis for any later conversation about damage, and it is far harder to assemble afterwards.
Agree what happens if a retained plant is damaged, and settle that before work begins rather than in the middle of a disagreement.
Agreements made calmly in advance are the ones that hold, and this particular conversation goes badly once damage has occurred.
7.Clearance, arisings and what a gap leaves behind
Removal is only half the operation. These prompts look at what remains in the ground and what the gap does to everything around it.
Ask what would be left in the ground after a removal, such as a stump or a root plate, and what dealing with it would involve.
What remains below ground often decides whether the space can be replanted, paved or built on, and it is easy to leave unasked.
Note what the ground under a long-established plant is likely to look like once it is exposed, and that it may not match the beds beside it.
Ground shaded and drawn on for a long time rarely presents as a ready planting bed, and owners expect otherwise.
Record where cleared material would be taken and who is responsible for removing it from the plot.
Arisings pile up quickly and occupy exactly the space the work needs, and responsibility for them is often assumed rather than agreed.
Disposal of garden waste, particularly anything invasive, is subject to local requirements; confirm these with the relevant authority and the professionals doing the work.
Consider what a removal opens up as well as what it takes away, including views into your garden from neighbouring windows.
Privacy lost through clearance is noticed immediately and takes a long time to replace, and it is entirely predictable beforehand.
Note whether removing one plant would leave another exposed to wind, sun or rain it has been sheltered from until now.
Established planting adjusts to its neighbours, and losses after a clearance are often the plants that were left rather than the ones taken.
Write down which parts of the clearance could be reversed and which could not, and treat the second group with more caution than the first.
Sorting decisions by reversibility is the simplest way to work out where to slow down and where to get on with it.
Preparation
Documents and information to gather
Having these to hand usually makes the first conversation shorter and more useful.
- A numbered list of existing planting with a provisional intention beside each item
- Photographs of every plant you are considering keeping, taken before work starts
- A sketch showing where each retained plant sits against boundaries and buildings
- Any information a previous owner left about the garden and its planting
- Dated notes of what you have observed about each tree, written as observations
- Correspondence with neighbours about growth crossing a shared boundary
Records
Decisions to record before work begins
Write these down in your own words, with the date, so everyone is working from the same version.
- Which plants are staying, which are going and which remain undecided
- Which items carry a personal association and must not be cleared by accident
- Where materials, spoil and machinery may not be stored on the plot
- What happens if a plant marked for retention is damaged during the work
- Which plants you would accept losing in an attempt to move them
- Which items are waiting on an arborist's view before they can be settled
Professional review
Questions to discuss with qualified professionals
Bring these to the relevant qualified professional, supplier or authority. Requirements vary by project and location.
- What can you tell me about the condition of this tree, and what are the options?
- What would need to be kept off the ground beneath a tree that is staying?
- How would you protect the planting we are keeping while the work goes on?
- Is this plant likely to survive being moved, and what would the move involve?
- What is left in the ground after a removal, and what does dealing with it involve?
- Which of the plants on my list are doing something I have not recognised?
- Who should I speak to at the local authority before any tree work is planned?
- What should I confirm about wildlife before anything is cut back or cleared?
Blind spots
Commonly overlooked items
- Planting that screens a neighbouring window, noticed only once it has gone
- Machinery and materials stored over the roots of a tree that is being kept
- Growth arriving from a neighbouring plot and the question of who may cut it
- Wildlife using planting that is about to be cleared without warning
- The state of the ground revealed under a long-established plant
- A tree nobody thought to ask the local authority about before clearance was agreed
- A retained plant left exposed to wind once its neighbour has been removed
What this checklist does not do
- Retention decisions are prepared here only; nothing on this page assesses the condition, soundness or safety of any tree or plant.
- Tree work of any kind, including cutting back, belongs with a qualified arborist, and protection status can only be confirmed by the local authority.
- Clearance can affect nesting birds and other protected wildlife, and what applies and when must be confirmed locally before work is planned.
- Whether roots are affecting a wall, a drain or a surface is a question for qualified professionals rather than something to judge from what is visible.
More preparation
Related checklists
Inspiration
Related Ideas Library pages
Design directions to explore once the preparation is done.
Go deeper
Related Build Design Hub guides
Explanatory planning guidance behind the decisions on this page.
Planting & Garden Maintenance Checklists
Planting brief and aftercare checklists — describing conditions honestly, agreeing who maintains what, and the questions for a designer, nursery or arborist.
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