Shrub pruning

Whether you have formal box hedging, sprawling hydrangeas, or ornamental evergreens, professional pruning prevents plants from becoming "leggy" or congested. In the UK’s damp climate, proper thinning is also vital for airflow, reducing the risk of fungal infections like powdery mildew.

What Does the Work Involve?

• Initial Assessment: Identifying the species and its specific pruning requirements based on flowering time and growth habit.
• Health Check: Locating and removing the "three Ds"—dead, damaged, and diseased wood.
• Thinning and Airflow: Removing crossing branches and thinning out the centre of the shrub to allow light and air to reach the interior.
• Structural Shaping: Pruning to a desired height and spread while following the natural form of the plant.
• Renewal Pruning: Cutting back older stems to the base to encourage fresh, vigorous growth from the ground up.
• Site Clearance: Gathering all "arisings" (cuttings), chipping larger branches, and ensuring the garden is left tidy.
• Environmental Checks: Inspecting for active bird nests, wasp nests, or signs of protected species before starting work.

Typical Costs

Several factors will influence the final quote, including the accessibility of your garden and the sheer volume of waste generated. Heavily overgrown shrubs produce a surprising amount of "bulk" that requires significant time to process and remove.

Professional gardeners often charge more if they need to use specialist equipment like petrol-powered long-reach hedge cutters or commercial-grade wood chippers.

How Long Does It Take?

• Individual Specimen Pruning: 30 to 60 minutes per shrub, depending on size and complexity.
• Typical Suburban Border: 2 to 4 hours to prune, shape, and clear away debris.
• Large Garden Maintenance: 1 to 2 full days for a team of two gardeners.
• Overgrown Rejuvenation: A full day may be required just to tackle one or two very large, neglected shrubs.

DIY or Professional?

Light "deadheading" and basic trimming are well within the reach of most homeowners with a sharp pair of secateurs. However, structural pruning or tackling large, woody shrubs is often best left to a professional who understands the specific "growth points" of different species.

Incorrectly timed pruning can kill a plant or prevent it from flowering for several years. Professionals also carry high-grade insurance and have the equipment to handle thorny species or work at height safely, adhering to UK health and safety standards.

Choosing the Right Tradesperson

• Qualifications: Look for RHS (Royal Horticultural Society) Level 2 or 3 qualifications or NPTC certifications for machinery use.
• Insurance: Ensure they hold Public Liability Insurance (minimum £1 million to £5 million).
• Waste Licence: Confirm they hold a valid Environment Agency Waste Carrier Licence if they are taking cuttings away.
• Red Flags: Be wary of anyone offering to "top" trees or shrubs aggressively without explaining why, or those who cannot identify the plants they are pruning.

Questions to ask:

• Do you have a waste carrier licence and is disposal included in the price?
• Will you be checking for nesting birds before you start?
• What specific pruning technique do you recommend for my [Plant Name]?
• Do you bring your own tools, and are they disinfected between jobs to prevent disease spread?

UK Regulations

• Wildlife and Countryside Act 1981: It is an offence to intentionally damage or destroy a wild bird's nest while it is in use or being built. This typically restricts heavy pruning between March and August.
• Tree Preservation Orders (TPOs): Some large shrubs or "trees in shrub form" may be protected. Check with your local council before significant work.
• Conservation Areas: If you live in a Conservation Area, you may need to give six weeks' notice to the local planning authority for work on certain species.
• Waste Disposal: Commercial gardeners must dispose of green waste at licensed facilities; it cannot be put in domestic "brown bins."

Common Problems

• Pruning at the Wrong Time: Cutting spring-flowering shrubs in winter will remove all the flower buds for the coming year.
• Blunt Tools: Using dull blades crushes the stems rather than cutting them, creating an entry point for rot and disease.
• "Lion-Tailing": Removing too much inner growth, leaving foliage only at the tips, which makes the shrub vulnerable to wind damage.
• Neglecting Tool Hygiene: Spreading diseases like "Box Blight" or "Honey Fungus" from one garden to another via uncleaned shears.
• Over-pruning: Taking more than 25-30% of the canopy at once can shock the plant and lead to "dieback."

Frequently Asked Questions

When is the best time of year to prune my shrubs?

It depends on the species. As a general rule, prune spring-flowering shrubs immediately after they finish flowering, and summer-flowering shrubs in late winter or early spring.

Can you prune shrubs during the bird nesting season?

While not strictly illegal to prune, it is illegal to disturb a nest. Most UK professionals will perform a thorough "nest check" and will refuse to prune a specific area if an active nest is found until the chicks have fledged.

Why is my shrub not flowering after being pruned?

This usually happens if the plant was pruned at the wrong time of year, cutting off the "old wood" where the buds were already formed. It can also be caused by "hard pruning" which forces the plant to focus on leaf growth rather than flowers.

What is the difference between pruning and shearing?

Pruning involves making selective cuts to individual branches to improve health and shape. Shearing is a "blanket" cut across the surface (like a hedge) to create a formal, smooth shape.

Should I put "wound paint" on large pruning cuts?

Current horticultural advice in the UK suggests that wound paints are generally unnecessary and can actually trap moisture and fungus. It is better to make clean, angled cuts that allow the plant to heal naturally.

How do I know if my shrub is dead or just dormant?

Perform the "scratch test." Gently scrape a small piece of bark off a stem with your fingernail. If it is green underneath, the plant is alive; if it is brown and brittle, that section is dead.