Pruning and Training Plants Guide
Pruning and training are essential gardening skills that improve plant health, direct and control growth, increase flower and fruit production, and maintain the natural beauty of your garden plants. Proper pruning removes dead, diseased, or damaged wood before it causes problems, opens the plant canopy to light and air circulation for disease prevention, and directs the plant’s energy into productive growth patterns.
Pruning Basics
Understand your specific purpose before making each cut. Different pruning goals require different techniques. Removing dead or diseased wood improves plant health. Shaping a plant maintains its natural form or creates a specific silhouette. Thinning opens the canopy to light and air for better flower production and disease resistance. Heading back controls size and stimulates bushier, denser growth. Every cut changes how the plant grows, so make cuts with clear purpose and intention.
Make clean cuts at a 45-degree angle approximately a quarter inch above an outward-facing bud or a branch junction. Cutting above an outward-facing bud encourages new growth to develop away from the center of the plant, opening the center to light and air. Cutting above an inward-facing bud fills in the center of the plant, which is useful for shrubs that have become open and leggy. Use sharp, clean bypass pruners that make smooth scissor cuts rather than crushing the stem, because clean cuts heal quickly while torn or crushed tissue invites disease entry.
Remove no more than one-third of a plant’s total growth in a single pruning session. Removing more than this share stresses the plant by reducing its ability to photosynthesize and may significantly reduce flowering or fruiting in the current season. For severely overgrown plants that need major size reduction, spread the renovation pruning over two to three years, removing the oldest, thickest stems first rather than cutting everything back at once.
Pruning Tools
Hand pruners or secateurs are the most frequently used pruning tool for cutting stems up to three-quarters of an inch in diameter. Bypass pruners with two curved blades that slide past each other like scissors make the cleanest cuts on living wood and are the best choice for general pruning. Anvil pruners with a single straight blade that cuts against a flat surface crush stems slightly and are better suited for cutting dead wood where crush damage does not matter.
Loppers have long handles that provide extra leverage for cutting stems up to one and a half inches thick and reaching deeper into the plant without getting scratched. A pruning saw with a curved blade and coarse, sharp teeth cuts branches from one and a half to four inches thick that are too large for loppers. Pole pruners extend your reach to prune high tree branches without needing a ladder. Hedge shears with long, straight blades shape hedges and topiary but are not suitable for precision pruning on individual stems.
Keep all cutting tools sharp and clean. Disinfect pruners between plants when cutting diseased wood to prevent spreading infection from one plant to another. A simple solution of one part household bleach to nine parts water or rubbing alcohol in a spray bottle provides quick disinfection in the garden. Dip or spray blades, let sit briefly, and wipe clean.
When to Prune
Prune most deciduous trees and shrubs during late winter or early spring while the plant is still fully dormant without leaves. Dormant pruning stimulates strong, vigorous growth in spring because the plant’s energy reserves are concentrated in the roots and available to fuel rapid new growth. The leafless winter structure makes it easy to see the branch framework and identify which branches to remove, without leaves obscuring the view.
Prune spring-flowering shrubs like lilacs, forsythia, quince, weigela, and deutzia immediately after they finish blooming. These important garden shrubs bloom on old wood, meaning they develop next year’s flower buds during the summer on growth produced after this year’s flowering. Pruning them in late winter or early spring removes the wood that carries the current season’s flower buds, eliminating the spring display. Pruning immediately after flowering gives the plant the entire growing season to develop new flowering wood.
Prune summer-flowering shrubs like butterfly bush, hydrangea paniculata, and crape myrtle in early spring just as new growth begins. These plants bloom on new wood produced during the current season. Spring pruning removes the previous year’s growth and stimulates the development of strong new shoots that will produce the best flowers in summer. Cut these plants back hard, removing most of the previous year’s growth to just a few inches above the ground or to a low framework of main branches.
Training Vines and Climbers
Install sturdy supports like trellises, arbors, fences, or wall wires before planting vines to avoid disturbing established root systems. Guide young vines to their support system and tie them loosely with soft plant twine or flexible garden tape in a figure-eight pattern that prevents stem constriction. Check ties regularly through the growing season and loosen any that are becoming tight as stems increase in diameter.
Direct vine growth by selective pruning and tying. Remove stems that grow in unwanted directions and tie promising shoots to the support in the desired orientation. For aggressive vines like wisteria, pruning multiple times during the growing season controls rampant growth and promotes flower bud formation. Regular summer pruning keeps climbers within their allotted space and encourages the development of flowering side shoots.
Pruning Fruit Trees
Pruning fruit trees is essential for maintaining tree health, managing size for easy harvest, and maximizing fruit production in terms of both quantity and quality. Remove any dead, diseased, or damaged branches first regardless of the season. Remove water sprouts, which are vigorous upright shoots growing from the trunk or main branches, and suckers growing from the rootstock below the graft union, as these do not produce fruit and steal energy from the productive parts of the tree.
Open the center of the tree to light and air by removing branches that cross or rub against each other and thinning crowded branches. Good air circulation through the canopy reduces fungal diseases like apple scab and powdery mildew, and light penetration into the center of the tree promotes fruit bud development and even ripening of fruit. Prune in late winter while trees are dormant for most fruit trees, but wait until after bloom for apricots and cherries to reduce disease risk.
Shaping Ornamental Shrubs
Ornamental shrubs need regular pruning to maintain their natural shape, control their size, and keep them vigorous and productive. The first pruning step for any shrub is always to remove dead, diseased, or damaged wood completely. Next, remove any branches that cross or rub against each other to prevent bark damage and potential entry points for disease.
Thin the interior of dense shrubs by removing selected branches at their point of origin to improve air circulation and light penetration into the center of the plant. An open center supports healthy foliage and reduces disease pressure. Never shear ornamental shrubs into formal shapes unless you are intentionally creating a formal hedge or topiary, because shearing creates a dense outer layer of foliage that blocks light from reaching the interior, causing bare, leafless centers over time.
Frequently Asked Questions
Can I prune in summer?
Yes, light summer pruning is perfectly fine for removing dead or damaged wood, cutting back wayward growth that spoils the plant’s shape, and removing spent flowers to encourage reblooming. Avoid heavy summer pruning that removes significant foliage area because this stresses the plant during hot, dry weather when it is already under heat stress.
How do I prune an overgrown shrub?
Rejuvenate overgrown shrubs using renewal pruning over three years. Remove one-third of the oldest, thickest stems at ground level each year in early spring, selecting stems that are more than two inches in diameter or have peeling bark. This gradual approach prevents shock while allowing vigorous new replacement growth to develop. The plant is completely renewed after three years.
What is the difference between pruning and shearing?
Pruning makes selective, individual cuts for specific purposes like removing damaged wood, improving structure, or directing growth. Shearing cuts all growth at a uniform height to create formal geometric shapes like hedges and topiary balls. Shearing stimulates dense outer growth that eventually blocks light from reaching the plant interior, leading to bare, leafless centers over time as interior branches die from lack of light.
Do I need to seal pruning cuts with paint?
No, do not seal pruning cuts with pruning paint, wound dressing, or tree sealant. Trees and shrubs have natural defense mechanisms that compartmentalize wounded tissue and prevent decay spread. Sealing cuts actually traps moisture against the wound and can promote decay. Make clean cuts at the proper angle and let the plant manage its own healing process.
How do I prune a young tree for proper structure?
Establish a strong central leader by selecting one straight, upright stem as the dominant trunk and removing competing leaders that could create weak, splitting crotches. Remove branches with narrow V-shaped crotch angles that are structurally weak and likely to split as the tree grows larger. Gradually remove lower branches as the tree gains height, keeping the lowest permanent branches at least one-third of the tree’s total height from the ground.
When should I prune hydrangeas?
Pruning time depends on the hydrangea species. Bigleaf hydrangeas that bloom on old wood should be pruned immediately after flowering. Panicle and smooth hydrangeas that bloom on new wood should be pruned in late winter or early spring before new growth begins. Oakleaf hydrangeas bloom on old wood and should be pruned after flowering for the best bloom display.
How do I prune a hedge properly?
Prune hedges so the base is wider than the top, creating a slight taper. This tapered shape allows sunlight to reach the lower branches, keeping the hedge full and green from top to bottom. Hedges that are wider at the top than the bottom shade their own lower branches, which become thin, bare, and brown over time. Prune hedges two to three times per growing season for formal hedges, or once per year for informal hedges.
Can I prune a plant that is stressed from drought or disease?
Avoid pruning stressed plants. Pruning stimulates new growth that requires energy and resources the plant may not have when stressed. Wait until the plant has recovered from the stressor and is actively growing again before pruning. The only exception is removing dead or diseased wood, which should be done promptly to prevent the problem from spreading.
What should I do with the pruned branches?
Compost smaller pruned branches that are less than one inch in diameter after chopping them into smaller pieces. Chip or shred larger branches for use as garden mulch or add them to the compost pile as brown material. Dispose of branches from diseased plants in the trash rather than composting them to prevent spreading disease through the garden.
Pruning Techniques Guide Tree and Shrub Planting Guide Flower Gardening Guide