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The short answer
Most tree and shrub programmes are seasonal spray and feed applications on ornamental shrubs and small trees. That’s a legitimate service, and it’s not the same as arboriculture — structural assessment of mature trees needs a qualified arborist and usually sits outside these contracts. Ask which trees are included by size, and what happens when something is diagnosed rather than treated on schedule.
Usually covers
Ornamental shrubs, small trees
Usually excludes
Mature tree structure
Ask
Which trees, by size
Different trade
Arboriculture
What’s actually in the programme
Four things sold under this name, and they’re not equivalent.
Common
Seasonal spray and feed
Dormant oil, insecticide and fungicide applications on a calendar, plus fertilisation. Aimed at ornamental shrubs and small ornamental trees rather than mature specimens.
Better
Monitored programme
Inspection at each visit, treatment when something is found. Costs similarly and does considerably more, because it responds to the property rather than the calendar.
Different trade
Arboriculture
Structural assessment, pruning, cabling and removal of mature trees. Needs different qualifications and insurance, and it isn’t usually in a tree and shrub package despite the name.
Also different
Hedge and shrub trimming
Shaping and cutting rather than treating. A maintenance job rather than a plant health one, and usually priced separately.
The gap that catches people out
A property has a tree and shrub programme, a mature oak develops a structural defect, and the homeowner assumes it’s covered. It isn’t — the programme covers plant health on ornamentals, and structural assessment of a large tree is a different qualification entirely.
Ask directly which trees are included and above what size they’re excluded. The answer is usually a diameter or a height threshold, and it’s worth knowing before you need it.
Calendar against monitoring
The question that separates the two: “What happens if nothing is wrong at a scheduled visit?”
A monitored programme inspects and treats what it finds. A calendar programme applies the same sequence regardless. Both charge similarly. Only one is responding to your plants, and calendar spraying of healthy shrubs is applying product for no benefit.
Specifying it
Five questions, and the second is the one people don’t think to ask.
Ask which plants are included
By type and size. Ornamental shrubs and small trees is the usual scope, and mature specimens usually sit outside it.
Ask where the size cut-off is
A diameter or height above which trees aren’t covered. This is the gap that surprises people.
Ask if it’s monitored or calendar
What happens at a visit where nothing is wrong. It distinguishes an approach from a route.
Ask what’s diagnosed against assumed
Whether treatments respond to identified problems or run on a schedule.
Ask about structural work
Whether they do it, subcontract it, or refer it out. All three are fine; not knowing isn’t.
What’s usually in and out
Where this stops being a DIY job
Any structural concern on a mature tree. Cavities, fungal brackets, cracks, fresh lean. That’s an arborist rather than a plant health programme, and the distinction matters.
Anything above ladder height. Whether it’s treatment or pruning.
Anything near overhead lines. The utility, and it comes first regardless of who else is on site.
Advertising disclosure: calls are routed to an independent local provider. We’re paid a referral fee for the call. You pay the provider, never us.
What a good programme does
Inspects
Looks before treating
At every visit. Calendar spraying healthy shrubs is applying product for no benefit.
Scopes
States the size limit
Which trees are in, and above what size they’re out.
Refers
Says when it’s an arborist job
Rather than treating a structural problem as a health one.
Common questions
What does a tree and shrub programme cover?
Usually seasonal treatment and feeding of ornamental shrubs and small trees. Structural assessment of mature trees is a different qualification and usually sits outside it.
Does it include mature trees?
Generally not above a certain size. Ask where the cut-off is by diameter or height — that gap is what surprises people when a large tree develops a problem.
Is pruning included?
Usually not. Plant health treatment and pruning are separate services, and hedge trimming is separate again.
How do I know if the programme is worth it?
Ask what happens at a visit where nothing is wrong. A monitored programme inspects and treats what it finds; a calendar programme applies the same sequence regardless.
Mature trees, or a structural concern?
Asking which plants are covered and where the size cut-off sits takes one phone call and it closes the gap that catches most people out. Structural work on mature trees is a different trade and worth knowing that before you need it.
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