Container and Raised Bed Planting Questions Checklist

Write down what each proposed bed would stand on, whether that is open soil, paving, concrete, decking, a membrane or a roof surface.

What the bed sits on decides almost everything that follows, from drainage to weight, and it is rarely stated in an early conversation.

Note anything you know or suspect runs beneath the position, including drain runs, inspection covers, water pipes, cables and soakaways.

Covering an access point with a filled bed is one of those mistakes that only becomes expensive years later.

Locating buried services and drainage before anything is built is for a suitably qualified professional rather than for the owner to estimate.

Mark any cover, gully, tap, meter or stopcock that must stay reachable, and check whether the proposed bed would sit over or against it.

Access points are easy to design around before construction and effectively impossible to reach afterwards.

Record whether any bed would sit against a wall of the house, and raise ground levels and damp protection as questions before the position is fixed.

Piling growing medium against a building is one of the few garden decisions with consequences for the building itself.

Ground levels against a building wall and anything touching damp protection are matters for a qualified professional, with local requirements confirmed.

Note whether the position sits within reach of an established tree, and raise what building and filling over that ground would involve.

Adding depth over a root area affects the tree as much as the bed, and that is not an owner judgement.

Building or adding soil over the rooting area of a mature tree is for a qualified arborist to advise on before anything is planned.

Consider where water currently runs across the surface you are about to cover, and note whether the bed would sit in its path.

A bed placed across an existing run of surface water becomes permanently wet at one end for reasons nobody records at the time.

Ask what depth of growing medium the planting you have in mind would need in this position, rather than settling the height of the bed first and asking afterwards.

Height chosen for appearance is the most common reason a raised bed underperforms, and the order of these two decisions matters.

Note whether the bed sits on a hard surface with no soil below it, and raise that as a separate question from a bed open to the ground beneath.

A bed sealed underneath behaves like a large container, and the difference changes both depth and watering.

Ask how much filling material each bed would take, and get that in the units the supplier uses so the delivery matches what is needed.

Filling is consistently underestimated, and a part-filled bed at the end of the day is a common and avoidable outcome.

Write down where a bulk delivery could be dropped and how the material would travel from there to each bed, including any steps, gate or narrow passage.

Bulk materials are easy to order and hard to move, and the route decides how practical the whole idea is.

Ask what settling to expect once a bed is filled and watered, and who tops it up if the level drops noticeably.

Settling surprises people who filled a bed to the brim, and the responsibility for topping up is rarely discussed.

Ask what is proposed for the base of the bed and why, and record the answer rather than adopting something you have seen elsewhere.

Base treatment affects drainage and depth together, and it is worth understanding before the bed is closed up.

Write down that the beds must be considered when full and wet rather than as built, and raise that with a qualified professional before positions are fixed.

Owners visualise the empty structure, whereas the condition that matters is a full one after heavy rain.

What any surface, deck, balcony or roof can carry is for a suitably qualified professional to establish, never for the owner to judge.

Note whether any bed or large container would sit on a balcony, roof terrace, deck or anything other than solid ground, and flag it separately.

Anything above ground level moves the question out of gardening entirely and into a different professional conversation.

Planting on a balcony, roof or raised deck should be discussed with a suitably qualified professional and with whoever manages the building.

Record whether any bed would hold back existing ground on one side, since that is a retaining situation rather than a planter.

A bed cut into a slope is doing structural work, and it is often drawn as though it were simply a box.

Any structure holding back ground is a matter for a suitably qualified professional to design, with local requirements confirmed.

Consider whether anything is intended to be moved once filled, and be realistic that a filled container generally stays where it was put.

Movable is a word used freely at the planning stage and almost never afterwards, which affects where things should go.

Note what the container or bed stands on and whether that surface stains, marks or holds water underneath where nobody can see it.

Damage under a heavy planter is discovered when it is finally moved, by which point the surface has usually suffered.

Ask whether anything about your building, lease or management arrangement affects what may be placed outside, and confirm it before ordering.

Restrictions on balconies and shared outdoor space are common and are much easier to check than to unwind.

What your lease, building management or the local authority permits outside is for them to confirm rather than for you to assume.

Write down what the sides of each bed would be made of, and ask the supplier what is known about that material being in contact with growing medium.

This is a routine question for a supplier and a difficult one to resolve once the bed has been built and filled.

Suitability of any material in contact with growing medium, particularly where food is grown, is a question for the supplier and a qualified professional.

Ask whether a lining is proposed, what it is meant to do and what would happen to drainage if it were used.

Linings are added for several different reasons that pull against each other, so the purpose is worth stating.

Note which sides face full sun and which sit in shade, since the material of a raised bed can warm or cool through the day quite unevenly.

Aspect affects a raised bed more sharply than open ground because heat reaches the sides as well as the surface.

Consider whether anyone would sit or lean on the edge of the bed, and raise that with whoever is building it rather than assuming it would take the weight.

Edges get used as seats whatever the intention, and that changes what the top of the bed has to be.

Whether an edge can be sat on safely is for the qualified professional building it to confirm, not something to test once it is finished.

Ask how the corners and joints are formed, since fine material tends to wash out of gaps and stain whatever the bed stands on.

Losses through joints show up as a permanent tide mark on paving, and the detail is easy to raise beforehand.

Ask what would be involved in replacing the sides in due course, given that the bed would be full of established planting by then.

Replacement is much harder once planted, and the answer often changes which material an owner chooses.

Ask how much watering raised beds and containers in these positions would need compared with the same planting in open ground.

Raised planting is generally more demanding, and knowing that before committing prevents a garden nobody can keep up with.

Write down where the nearest outside tap is and whether a hose reaches every bed without being dragged across a route people use.

A hose that has to cross a doorway or path gets used less often, and the beds furthest from water are the ones that suffer.

Consider who waters while the household is away, and record that limitation rather than hoping the situation will not arise.

Containers can decline quickly without attention, and stating the gap early changes what should be planted in them.

Note what sits directly beneath and beside each bed, and ask where water leaving it would run once the planting is watered.

Drainage water carries fine material with it, and its destination is usually the paving, doorway or neighbour below.

Record whether anything below or beside your position belongs to someone else, and raise drainage with them before containers are placed.

Water arriving on someone else's balcony or paving is one of the most common causes of neighbour disputes about planting.

Where water may discharge, particularly above ground level or towards another property, is for a qualified professional and the local authority to confirm.

Ask what an automatic watering arrangement would involve here, who maintains it and what happens when it fails while nobody is looking.

Automatic watering shifts the problem rather than removing it, and the failure mode is what an owner should ask about.

Irrigation and any new outdoor water connection are for a suitably qualified professional to design, with local requirements confirmed.

Write down who will actually tend each bed, and design the height and position around that person rather than around the look of the layout.

The point of raising a bed is usually comfort for a particular person, and that person is often not consulted.

Consider whether the far side of each bed can be reached from where someone would stand, or whether they would have to lean across planting to get there.

Beds that cannot be reached across get tended from one side only, and the far side gradually becomes neglected.

If the bed is meant to suit someone who gardens seated or with limited reach, ask a qualified professional what that requires here before heights are set.

This is a specific requirement rather than a matter of preference, and it should be established by someone qualified to advise.

Requirements for anyone gardening seated or with limited mobility should be confirmed with a suitably qualified professional rather than assumed.

Note how much space would remain around each bed once it is built, and check whether a barrow, a bin or a person carrying a bag could still pass.

Space between beds is squeezed at the layout stage and regretted every time anything has to be carried through.

Record what the ground around the bed would be, and whether it holds water where someone has to stand to work.

A wet or uneven standing position is the reason some beds get tended far less than others.

Consider where watering cans, tools and spare material would be kept in relation to the beds, since distance decides how often they are used.

Upkeep follows convenience, and this is a cheap thing to arrange while the layout is still on paper.

Ask what topping up or refreshing the growing medium would involve, how the material would get there and who is expected to do it.

The refill job repeats indefinitely, and it is far more work than the original filling when the bed is planted.

Consider what would happen to spent growing medium if a bed were emptied, including where it would go and how it would leave the property.

Removal is harder than delivery, particularly through a house or a narrow side passage, and it is rarely thought about.

Note how the beds would look during any gap between plantings, particularly those seen from indoors or beside a door.

Bare containers in a prominent position look worse than bare open ground, and their position makes that unavoidable.

Decide honestly how many separate beds and containers the household can keep watered and tended, and write that limit down before any more are added.

Ambition at the planning stage outruns attention later, and setting a limit deliberately is easier than abandoning pots quietly.

Write down where empty containers would be stored out of season and whether that space actually exists.

Empty containers accumulate in exactly the spot the household least wants them, because nowhere was set aside.

Ask for the watering and topping-up arrangements in writing at handover, and keep them with whatever else you hold about the garden.

Instructions given verbally on the day disappear immediately, and raised planting depends on them more than open ground does.

Watering and topping-up arrangements should come from the qualified professional who filled and planted the bed, based on this position rather than on a general routine.