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Plant care

Dutch medlar (medlar 'Dutch') care

Mespilus germanica 'Dutch'

Also called Dutch medlar, Large Dutch medlar, medlar 'Dutch'.

RHS H6USDA 4-9Pet-safeIndoor 4–8 m tall × 4–8 m wide (13–26 ft)

Watering rhythm

Direct sun (at least 4-6 hours)

Regular until established; moderate thereafter

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Light

Direct sun (at least 4-6 hours)

Soil

Moderately fertile, moist but well-drained; tolerates chalk, clay, loam, and sand

Humidity

50–75%

Temp

-20 to 35°C

Pet safety

Pet-safe

Mature size

4–8 m tall × 4–8 m wide (13–26 ft)

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun gives the best cropping and fruit quality. The large, leathery leaves are highly ornamental but the tree performs best with at least six hours of direct sunlight. Tolerates very light partial shade at some cost to fruit yield. If your only bright window faces south, that's perfect for dutch medlar — same window any aroid would fry on.

Watering

Crops like dutch medlar reward consistent watering — regular until established; moderate thereafter. The mistake is the daily light sprinkle: it never reaches the deeper roots. A long soak twice a week beats a five-minute splash every day. Water thoroughly in dry spells during the first two to three seasons. Mature 'Dutch' trees are relatively drought-tolerant, but soil moisture during June–August improves fruit size. The vigorous root system generally sources moisture effectively in average British or US temperate soils.

Soil and pot

Dutch medlar grows best in moderately fertile, moist but well-drained; tolerates chalk, clay, loam, and sand. 'Dutch' shows good tolerance of calcareous soils and heavier clays compared to many fruit trees. Ideal pH is 6.0–7.5. Annual mulching with well-rotted organic matter benefits long-term soil health and moisture retention. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Dutch medlar sits happiest at around 50–75% humidity and -20 to 35°C (-4 to 95°F). Well adapted to the humid temperate conditions of northern and western Europe. The broad canopy of 'Dutch' benefits from open-centre pruning to maintain airflow and reduce fungal disease in wetter climates. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed dutch medlar sparingly. Annual application of a balanced fertiliser or well-rotted manure mulch in early spring is sufficient. 'Dutch' is vigorous and can over-grow if fed heavily; moderate nutrition produces better-quality rather than excessive fruit. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on dutch medlar in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Powdery mildew (Podosphaera clandestina) — White powdery growth on young shoots and leaves; particularly affects the large foliage of 'Dutch' in dry, warm conditions. Prune for airflow; avoid overhead irrigation. Resistant to major outbreaks under temperate UK conditions.
  • Brown rot (Monilinia fructigena) — Large fruits of 'Dutch' are susceptible to brown rot post-harvest or on the tree following wet autumns. Harvest before hard frosts and blet indoors; remove all rotten fruit promptly.
  • Aphids (various spp.) — New growth may attract aphid colonies in spring. Usually not severe on mature trees. Encourage natural predators; apply winter wash on dormant trees if populations were heavy the previous year.

Propagation

Grafting onto quince rootstock (Quince A for vigour, Quince C for compact growth) or hawthorn (Crataegus monogyna) in late winter is standard practice. Hardwood cuttings in autumn have moderate success. Seed produces variable, slow-to-fruit seedlings. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Dutch medlar is pet-safe. Mespilus germanica is not listed by the ASPCA as toxic to dogs, cats, or horses. No toxic principle has been reported in the fruit flesh or foliage of the genus. As with all rosaceous fruits, seeds contain trace cyanogenic compounds; discourage pets from chewing seeds in quantity. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Dutch medlar care — frequently asked questions

What is the common name for Mespilus germanica 'Dutch'?

Mespilus germanica 'Dutch' is most commonly called Dutch medlar, but it is also known as Dutch medlar, Large Dutch medlar, medlar 'Dutch'. The names refer to the same species, so care instructions for Dutch medlar apply identically to anything sold as medlar 'Dutch'.

How much light does dutch medlar need?

Dutch medlar grows best in direct sun (at least 4-6 hours). Full sun gives the best cropping and fruit quality. The large, leathery leaves are highly ornamental but the tree performs best with at least six hours of direct sunlight. Tolerates very light partial shade at some cost to fruit yield.

How often should I water dutch medlar?

Water dutch medlar regular until established; moderate thereafter. Water thoroughly in dry spells during the first two to three seasons. Mature 'Dutch' trees are relatively drought-tolerant, but soil moisture during June–August improves fruit size. The vigorous root system generally sources moisture effectively in average British or US temperate soils. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is dutch medlar toxic to cats and dogs?

Dutch medlar is pet-safe. Mespilus germanica is not listed by the ASPCA as toxic to dogs, cats, or horses. No toxic principle has been reported in the fruit flesh or foliage of the genus. As with all rosaceous fruits, seeds contain trace cyanogenic compounds; discourage pets from chewing seeds in quantity.

What USDA hardiness zone does dutch medlar grow in?

Dutch medlar is rated for USDA zone 4-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Dutch medlar deep-dive guides

Every aspect of dutch medlar care, each with its own calibrated guide:

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Dutch medlar qualifies for 1 curated Growli shortlist — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Dutch medlar is also known as Dutch medlar, Large Dutch medlar, and medlar 'Dutch'.