Garden Care Guide

Common Boxwood Care

Buxus sempervirens

A slow-growing, evergreen, densely textured shrub; it is used especially in formal gardens, hedges and topiary (shaped pruning). Its greatest threat is the caterpillar of the Box Tree Moth (Cydalima perspectalis), which can eat the leaves completely.

Hardy · -20 °C / -4 °F

Monthly care calendar

Timings are for a temperate Northern Hemisphere climate. In warmer areas tasks start earlier, in colder areas later; in the Southern Hemisphere shift them by six months.

January
  • Watering: Not needed if winter precipitation is sufficient; if it turns dry, water deeply once a month (20-30 L/m²).
  • Pruning: With clean tools, remove dead and rubbing branches; thin selected branches at the base so that air and light can enter the interior. Do not repeatedly shear only the outer surface, which creates a dense shell. Skip if: strong frost is expected, the plant has just been planted, or there is active heat/drought stress.
  • Plant protection: Check the inner parts of the plant for overwintering box tree moth caterpillars or scale insects. Apply dormant oil if necessary.
  • General care: Remove fallen leaves from within the plant to improve air circulation.
  • Pests & diseases: Check inside the plant for overwintering moth caterpillars in webbed structures.
February
  • Watering: If there is no rainfall, water once a month (20-30 L/m²).
  • Pruning: With clean tools, remove dead and rubbing branches; thin selected branches at the base so that air and light can enter the interior. Do not repeatedly shear only the outer surface, which creates a dense shell. Skip if: strong frost is expected, the plant has just been planted, or there is active heat/drought stress.
  • Plant protection: Applying Bordeaux mixture after pruning can help prevent fungal diseases.
  • General care: Clear away pruning debris and litter.
  • Pests & diseases: Carry out a general condition check.
March
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Fertilizing: Apply a balanced fertilizer or well-rotted organic fertilizer once when it wakes from dormancy.
  • Pruning: With clean tools, remove dead and rubbing branches; thin selected branches at the base so that air and light can enter the interior. Do not repeatedly shear only the outer surface, which creates a dense shell. Skip if: strong frost is expected, the plant has just been planted, or there is active heat/drought stress.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Good time for planting and transplanting.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
April
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Good time for planting and transplanting.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
May
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Fertilizing: If necessary, one half-strength application of balanced liquid fertilizer can be given at the beginning of the month.
  • Pruning: Formal hedges and topiary may be lightly trimmed at the end of the month to keep them neat.
  • Plant protection: Repeat the checks for box tree moth and, if necessary, the spraying.
  • General care: Spread a 5-7 cm layer of mulch over the root zone; it retains soil moisture and suppresses weeds. Do not pile mulch against the trunk.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
June
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Pruning: Do shaping and hedge pruning. Do shaping pruning on a cloudy day or early in the morning; leaf edges cut in the sun turn brown.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Plants in places with afternoon shade experience less stress.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
July
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Pruning: Do not prune.
  • Plant protection: Continue checking for box tree moth. Check the undersides of leaves for spider mites.
  • General care: Keep it in a position sheltered from midday sun; scorching at the leaf edges is a sign of burn.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
August
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Pruning: **Do not prune.** During this period, pruning will stimulate new shoots that would be damaged by frost.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Begin removing fallen leaves from in and around the plant.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
September
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Fertilizing: Stop fertilizing.
  • Pruning: Do the last formative pruning of the season; do not let it put out new shoots before frost.
  • Plant protection: For the last generation of box tree moth, check the inside of the plant carefully one last time this month. If necessary, do a final spraying.
  • General care: Clear fallen leaves to prevent diseases from sheltering.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
October
  • Watering: Apply the weekly total, including rainfall, slowly to the root zone (20-25 L/m²). Apply the water to the soil, not the leaves; if surface runoff occurs, split the same total into shorter applications. Skip if: the root zone is still moist, the last 7 days of rainfall is 20 L/m² or more, or the soil is saturated.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Good time for planting and transplanting.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
November
  • Watering: Not needed; rainfall is sufficient.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: The plant has entered its rest period.
  • Pests & diseases: Check the interior and lower leaves for yellowing, spotting, rapid leaf drop, dieback, and black streaks on the stems. Do not move suspicious fallen leaves to other areas. Skip this if the plant is fully under snow or cannot be inspected safely.
December
  • Watering: Not needed. Potted plants can be watered lightly once a month if the soil dries out completely.
  • Pruning: With clean tools, remove dead and rubbing branches; thin selected branches at the base so that air and light can enter the interior. Do not repeatedly shear only the outer surface, which creates a dense shell. Skip if: strong frost is expected, the plant has just been planted, or there is active heat/drought stress.
  • General care: Evergreen leaves continue to lose water in winter. Water thoroughly once before the soil freezes.

The care advice on this page is general and for information only; it is not professional advice. Plant age, soil and your garden’s microclimate can change the outcome. Plant protection products are mentioned only as general information; they are regulated, and the choice, dose and timing must be decided by a qualified professional under local rules. Consult a landscape architect or agronomist before applying.

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