Demystifying Pruning

• A. To increase the total amount of water the plant absorbs from the soil
• B. To remove dead, damaged, or unwanted parts so the plant grows healthier and in a desired shape
• C. To force the plant to produce more leaves than it normally would
• D. To change the plant's genetic makeup so it becomes more disease resistant

• A. A healthy branch growing in the desired direction
• B. A branch that is crossing and rubbing against another branch
• C. A young shoot with several healthy leaves at the tip
• D. A branch that supports a large portion of the canopy

• A. Because the plant has no nutrients stored during dormancy
• B. Because the plant is less stressed and wounds are less likely to attract disease or pests
• C. Because pruning during dormancy makes the plant grow faster in spring
• D. Because dormant plants are easier to water after pruning

• A. It reduces the risk of fungal diseases by allowing foliage to dry more quickly
• B. It increases the amount of sunlight absorbed by the roots
• C. It prevents the plant from producing flowers or fruit
• D. It makes the plant produce thicker trunks at the base

• A. A rake
• B. Hand pruners (secateurs)
• C. A spade
• D. A garden hose nozzle

• A. In the roots, at the root tips only
• B. At growing points called meristems, located at the tips of stems and roots and in buds ✓
• C. Across the bark, evenly spread along the trunk
• D. Only in the seed, which is never replaced after germination

Why: Plant growth happens at meristems, which are regions of actively dividing cells found at stem and root tips and in buds. Knowing where these are helps gardeners decide where a cut will stimulate new growth.

• A. The tendency of a plant to grow roots faster than shoots
• B. The suppression of side-branch growth by the main growing tip, which is controlled by the hormone auxin ✓
• C. The process by which leaves turn toward the strongest light source
• D. A plant's ability to repair damaged bark within a single season

Why: Apical dominance occurs when the terminal bud releases auxin that keeps lateral buds dormant. Removing the top of a plant, as in pinching, reduces this hormone signal and encourages bushier growth.

• A. Because cutting directly into the trunk prevents the plant from producing any sap
• B. Because leaving a long stub invites pests, while cutting just above a bud directs new growth outward and helps the wound close cleanly ✓
• C. Because buds must be removed before they can produce new leaves
• D. Because plants only grow from the point where a cut was made, so cutting high encourages height

Why: A cut just above an outward-facing bud encourages growth in that direction and minimizes dieback of the stub. Long stubs tend to die back and can become entry points for disease.

• A. In the middle of the summer heat, when growth is fastest
• B. During the dormant season in late winter, before new growth begins ✓
• C. In the autumn, just before the first frost
• D. At any time, because pruning has no effect on the plant's seasonal cycle

Why: Pruning while a plant is dormant reduces stress and lets the plant direct its stored energy into strong new growth in spring. Pruning during active growth can cause excessive sap loss or stress.

• A. The plant immediately grows extra leaves to replace them
• B. The roots are triggered to grow faster to compensate for the lost surface area
• C. The plant loses its ability to photosynthesize, which can weaken it and reduce its energy reserves ✓
• D. Nothing, because leaves do not contribute to a plant's food supply

Why: Leaves are the main sites of photosynthesis, which produces the sugars plants use for energy. Removing too much foliage at once can reduce energy reserves and stress the plant, which is why experts recommend removing no more than about a quarter of the canopy in a single season.

• A. A pair of bypass hand pruners ✓
• B. A pair of hedge shears
• C. A chainsaw
• D. A pruning saw with no guard

Why: Bypass hand pruners cut cleanly on branches up to about 3/4 to 1 inch in diameter, and their scissor-like action makes a clean cut that heals well. Hedge shears are designed for foliage shaping, and chainsaws are overkill for this size.

• A. They are cheaper to manufacture
• B. They make clean, scissor-like cuts that cause less damage to plant tissue ✓
• C. They can cut thicker branches than anvil pruners
• D. They never need to be sharpened

Why: Bypass pruners work like scissors, with a sharp blade passing by a curved blade, which slices cleanly. Anvil pruners crush stems against a flat surface, which can bruise and damage living tissue, making them better suited to dead wood.

• A. Use a coarse angle grinder at high speed
• B. Use a fine-grit file or whetstone along the original bevel, keeping the angle consistent ✓
• C. Rub the blade with sandpaper in random directions
• D. Heat the blade until it glows, then quench it in water

Why: Sharpening with a fine file or whetstone while following the original bevel removes only the minimum metal needed to restore an edge. Aggressive grinding can overheat and soften the steel, and random sanding does not create a proper edge.

• A. Only at the end of the season
• B. Once a year, before winter storage
• C. Between plants, or whenever you suspect disease, using rubbing alcohol or a 10% bleach solution ✓
• D. Never, because cleaning dulls the blades

Why: Cleaning between plants prevents spreading bacterial and fungal diseases from one plant to another. Rubbing alcohol or a diluted bleach solution is effective, and cleaning does not harm a properly maintained blade.

• A. Store them damp in a sealed plastic bag
• B. Wipe them dry, lightly oil the blade and pivot, and store them in a dry place ✓
• C. Leave them outside so the weather cleans them
• D. Store them with the blades open and touching other metal tools

Why: Drying the blades prevents rust, and a light oil coat protects the metal and keeps the pivot moving smoothly. A dry storage location further prevents corrosion, which is the main cause of premature tool deterioration.

• A. Late winter, before the buds open
• B. Immediately after they finish flowering ✓
• C. Midsummer, when growth slows
• D. Late autumn, after the first frost

Why: Spring-flowering shrubs set their flower buds on last year's wood during late summer. Pruning right after they bloom gives the plant time to develop new buds for next year's flowers. Pruning in late winter or spring would remove those buds.

• A. During the heat of summer
• B. In early spring just before buds break, or during dormancy in winter ✓
• C. In the middle of autumn while leaves are still falling
• D. Immediately after the first flush of spring growth

Why: Pruning while the tree is dormant (late winter) or just before bud break makes wounds heal quickly and encourages strong new growth. Summer pruning can also be used to control size, but the main structural pruning is best done in dormancy.

• A. Tools become too dull to use in cooler weather
• B. It can stimulate tender new growth that may be damaged by frost before it hardens off ✓
• C. Pruning in autumn attracts harmful insects
• D. Plants are unable to absorb water during this season

Why: Pruning in late summer or fall can trigger new growth that doesn't have time to harden before winter cold arrives. That soft growth is vulnerable to frost damage, which can weaken the plant.

• A. Immediately after they bloom in summer
• B. In late winter or early spring while the plant is dormant ✓
• C. In the middle of the blooming season
• D. Only in the fall after leaves drop

Why: Summer-flowering shrubs bloom on new growth produced in the current season. Pruning in late winter or early spring encourages vigorous new shoots that will carry the flowers, without removing the buds they need.

• A. Only during the dormant season
• B. Only during the peak growing season
• C. Whenever you notice them, regardless of season ✓
• D. Only after the plant has flowered

Why: Dead, damaged, or diseased wood should be removed as soon as it is noticed, since it can harbor pests or disease and may pose a safety hazard. Timing restrictions mainly apply to healthy wood and flowering considerations.

• A. Flush against the trunk, removing the branch collar
• B. Just outside the branch collar, leaving the collar intact ✓
• C. Halfway along the branch, leaving a long stub
• D. At least two inches away from the branch collar

Why: The branch collar contains specialized tissue that helps the tree seal the wound. Cutting just outside the collar preserves this tissue, allowing faster and healthier wound closure, whereas cutting flush damages it.

• A. Make a single cut from the top straight through the branch
• B. Make an undercut first, then a cut from the top a few inches further out ✓
• C. Saw from the bottom only, cutting upward until the branch falls
• D. Remove the branch in one quick pull with a saw

Why: An undercut about a third of the way through the branch, made a short distance from the trunk, prevents the weight of the branch from tearing bark down the trunk. The final top cut then removes the remaining stub cleanly.

• A. A heading cut that shortens the branch to a bud
• B. A thinning cut that removes the entire branch back to its point of origin ✓
• C. A topping cut that removes the top of the tree
• D. A stub cut that leaves a two-inch piece of the branch

Why: A thinning cut removes a branch completely at its point of origin, which reduces crowding without stimulating a flush of vigorous new growth the way heading cuts do.

• A. Stubs attract pollinating insects that damage fruit
• B. Stubs die back and become entry points for decay and pests ✓
• C. Stubs cause the tree to grow faster in the wrong direction
• D. Stubs make the tree vulnerable to frost only in winter

Why: Stubs lack the living tissue needed to compartmentalize wounds effectively. They tend to die back, and the dead wood can allow fungi and insects to enter the trunk or branch.

• A. During peak summer heat when growth is fastest
• B. In late fall just before the first hard frost
• C. During dormancy in late winter, before spring growth begins ✓
• D. Immediately after the first spring rains

Why: Pruning during winter dormancy lets you clearly see the tree's structure, minimizes stress since the tree is not actively growing, and allows wounds to begin healing as growth resumes in spring. Exceptions exist, such as trees that bleed sap heavily, which are better pruned in summer.

• A. To encourage the tree to produce fruit as early as possible
• B. To develop a strong framework of well-spaced main branches ✓
• C. To remove all lower branches so the trunk grows taller
• D. To keep the canopy as dense as possible for shade

Why: Structural pruning builds a sound framework of well-spaced, strong scaffold branches that will support the tree's mature form and reduce the risk of breakage later on.

• A. A well-spaced branch with a wide crotch angle
• B. A branch growing at a narrow angle that forms a tight V-shaped fork with the trunk ✓
• C. A lateral branch on the lower third of the trunk
• D. A branch positioned on the south side of the tree

Why: Narrow-angled forks often include bark trapped between the branch and trunk, creating a weak attachment that is prone to splitting as the tree grows. Removing or redirecting these is a standard training practice.

• A. In the heat of mid-summer
• B. During autumn leaf fall
• C. While the tree is dormant in late winter ✓
• D. Immediately after the first frost in spring

Why: Dormant-season pruning in late winter lets you clearly see the branch structure without leaves, and trees are less stressed and less prone to disease entry during dormancy.

• A. To shape the branch into a decorative form
• B. To prevent the bark from tearing down the trunk when the branch falls ✓
• C. To speed up the healing of the wound
• D. To make the branch easier to haul away

Why: The three-cut method involves an undercut, a top cut to remove most of the weight, and a final cut just outside the branch collar. This prevents the heavy limb from stripping bark off the trunk as it falls.

• A. Remove all the side shoots except the topmost one and cut back the main stem to encourage a single trunk ✓
• B. Shear the entire shrub into a uniform ball each year
• C. Remove the lowest buds on every branch
• D. Leave the shrub completely unpruned for the first five years

Why: Training a shrub to a single stem involves removing competing side shoots and keeping one dominant leader, which gives the plant a tree-like form. Selective, not uniform, cuts achieve this.

• A. To remove all of a tree's foliage in a single season
• B. To remove dead, diseased, damaged, or crossing branches and keep a plant healthy and well-shaped ✓
• C. To encourage the tree to grow as tall as possible
• D. To cut back roots so the tree stays small

Why: Maintenance pruning focuses on removing dead, diseased, damaged, or crossing branches and shaping the plant to keep it healthy, safe, and attractive. Removing all foliage or cutting roots would harm the plant.

• A. A healthy branch growing in a desirable direction
• B. A branch that is dead, broken, or diseased ✓
• C. The longest branch on the tree
• D. A branch with abundant green leaves

Why: Dead, broken, or diseased branches pose safety risks and can spread disease, so they are usually removed first. Healthy branches should be retained unless they interfere with structure or growth.

• A. Cutting off the top of a tree, leaving large stubs that promote weak regrowth ✓
• B. Removing the lowest branches to raise the canopy
• C. Thinning the interior of the canopy to let light through
• D. Removing suckers from the base of the trunk

Why: Topping cuts off the main leader or crown, leaving large stubs. It stresses the tree and produces weak, fast-growing shoots that are prone to breaking, and it is considered a harmful practice.

• A. Flush against the trunk or main limb
• B. Just above a bud or lateral branch, angled slightly away from it ✓
• C. Several inches away from any bud, leaving a long stub
• D. Directly through the middle of the branch

Why: Cutting just above a bud or lateral branch, at a slight angle, encourages proper healing and directs new growth outward. Cutting flush into the trunk damages the branch collar, and long stubs tend to die back and decay.

• A. Keep blades dull so they grip the branch better
• B. Clean and sharpen tools regularly and disinfect them between plants when disease is a concern ✓
• C. Use the same dirty tool for every plant to save time
• D. Only sharpen tools once a year, regardless of use

Why: Sharp, clean tools make precise cuts that heal quickly, and disinfecting between plants prevents spreading diseases. Dull blades crush tissue, and dirty tools can transmit pathogens.