Garden Care Guide

European Ash Care

Fraxinus excelsior

A large deciduous tree of cool, humid climates. It is not suitable for Manisa's hot, dry summers and needs generous watering. It is also very susceptible to ash dieback (Hymenoscyphus fraxineus), which has been devastating across Europe and in Turkey, so planting it is not recommended.

Hardy · -30 °C / -22 °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
  • Pruning: While the tree is dormant, this is the best time to remove dead, diseased or weak branches and carry out structural pruning (, seek professional help).
  • General care: The plant is in dormancy.
  • Pests & diseases: Check branches for signs of ash dieback disease (branches drying out, bark necrosis).
February
  • Fertilizing: For young trees, a slow-release balanced NPK (e.g. 15-15-15) can be applied at the end of the month.
  • Pruning: While dormant, remove dry, broken, crossing and inward-growing branches so that air and light reach the inside of the crown. Prune lightly in late winter to early spring; the natural teardrop shape should be preserved. Avoid prolonged drought; it causes cracking at the leaf bases. It is extremely sensitive to being planted in its own ashes; consider alternative species.
  • General care: It is getting ready to wake.
March
  • Watering: Water a newly planted specimen more often than established plants during its first year, as its root system is still shallow.
  • Fertilizing: Apply a balanced fertilizer or well-rotted organic fertilizer once when it wakes from dormancy.
  • 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: Suitable period for planting and transplanting. Flowering begins.
  • Pests & diseases: Check the branches and trunk for brown, fixed bumps (scale insects).
April
  • Watering: If there is no rainfall, water every 15 days. Water newly planted plants more often than established plants during the first year; the root system is still shallow.
  • General care: Suitable period for planting and transplanting. Flowering continues.
  • Pests & diseases: Watch for spotting or early wilting on the leaves.
May
  • Watering: If there is no rainfall, water once a week.
  • 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: 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: If you see black spots with yellow halos on the leaves (black spot), collect the diseased leaves and remove them from the garden; the disease overwinters in fallen leaves. Check the branches and trunk for brown, immobile bumps (scale insects).
June
  • Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The root zone should be wetted to a depth of 30-40 cm.
  • 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: Heat stress begins; regular and abundant watering is vital.
  • Pests & diseases: If you see black spots with yellow halos on the leaves (black spot), collect the diseased leaves and remove them from the garden; the disease overwinters in fallen leaves.
July
  • Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The root zone should be wetted to a depth of 30-40 cm.
  • Fertilizing: Never given.
  • Plant protection: Check for spider mites.
  • General care: This is the most challenging month.
  • Pests & diseases: Heat stress and secondary pests such as bark beetles are the biggest threats.
August
  • Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The root zone should be wetted to a depth of 30-40 cm.
  • General care: The tree is in survival mode.
  • Pests & diseases: Stress-related leaf drop may be seen.
September
  • Watering: If there is no rainfall, water once a week.
  • Pruning: Remove only branches that dried out completely in summer.
  • 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: This is the tree's recovery period; planting new young trees is not recommended.
  • Pests & diseases: If you see black spots with yellow halos on the leaves (black spot), collect the diseased leaves and remove them from the garden; the disease overwinters in fallen leaves.
October
  • Watering: If there is no rainfall, water every 15 days. Water newly planted plants more often than established plants during the first year; the root system is still shallow.
  • General care: Good time for planting and transplanting.
  • Pests & diseases: Collecting and destroying fallen leaves may reduce the risk of fungal disease.
November
  • Watering: Water a newly planted specimen more often than established plants during its first year, as its root system is still shallow.
  • General care: Good time for planting and transplanting. Collect fallen leaves; many disease agents and pests overwinter under them.
December
  • Pruning: If needed, shaping pruning may be carried out.
  • General care: The tree is fully dormant.

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.

Want reminders for every plant in your garden? Our garden-care app with monthly task lists and frost alerts is currently available in Turkish; the English version is on the way.

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