Garden Care Guide

Lisianthus Care

Eustoma grandiflorum

A valuable cut flower known for its elegant, rose-like flowers. It loves full sun and well-drained, calcareous soils but is very sensitive to root rot; the soil should be allowed to dry out between waterings.

Frost-tender (protect from frost) · 0 °C / 32 °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
  • General care: Not grown in the garden; professional greenhouses begin propagation from seed this month.
  • Frost risk: If frost is expected, cover with frost fabric; if in a pot, move to a sheltered place. Damaged below approximately 0 °C.
February
  • General care: Not present in the garden; if you want to try growing it indoors from seed, sow in a bright, warm location.
  • Frost risk: If frost is expected, cover with frost fabric; if in a pot, move to a sheltered place. Damaged below approximately 0 °C.
March
  • Watering: For newly planted seedlings, give a first watering and keep the soil moist.
  • Fertilizing: Two to three weeks after transplanting, begin feeding with a balanced liquid fertilizer (e.g., 15-15-15). Do not overfeed.
  • Plant protection: Be careful of root rot in young seedlings.
  • General care: Once the risk of last frost has passed is the best time to plant ready-grown seedlings.
  • Pests & diseases: Protect young seedlings from slugs and snails.
  • Frost risk: If frost is expected, cover with frost fabric; if in a pot, move to a sheltered place. Damaged below approximately 0 °C.
April
  • Watering: If there is no rainfall, water every 15 days.
  • Fertilizing: Give liquid fertilizer once a month.
  • Pruning: The tops of young plants can be pinched out to encourage more branching.
  • Plant protection: Watch for powdery mildew.
  • General care: The plant is growing tall quickly; provide support (netting or stakes) if needed.
  • Pests & diseases: Check for aphids.
May
  • Watering: If there is no rainfall, water once a week.
  • Fertilizing: Give liquid fertilizer once a month.
  • Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
  • Plant protection: Watch for Botrytis (gray mold) and powdery mildew, and provide good ventilation.
  • 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: Fungal diseases are the biggest risk.
June
  • Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. Water so that the soil is wetted 10-15 cm down from the surface.
  • Fertilizing: Give liquid fertilizer once a month.
  • Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
  • General care: Main flowering period; harvest cut flowers early in the morning.
July
  • Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. Water so that the soil is wetted 10-15 cm down from the surface.
  • Fertilizing: Give liquid fertilizer once a month.
  • Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
  • Plant protection: Check for spider mites.
  • General care: Extreme temperatures stress the plant, and afternoon shade is beneficial.
  • Pests & diseases: Watch for heat stress and root diseases.
August
  • Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. Water so that the soil is wetted 10-15 cm down from the surface.
  • Fertilizing: Give liquid fertilizer once a month.
  • Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
  • General care: The plant gradually completes its life cycle.
  • Pests & diseases: As the plant ages, it becomes more susceptible to disease.
September
  • Watering: If there is no rainfall, water once a week.
  • Fertilizing: Make this month's feeding the last of the season; afterward, the plant needs to prepare for winter.
  • Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
  • General care: Plants have generally completed their life cycle this month; remove plant debris and prepare the area for new planting.
  • Pests & diseases: The bed is empty.
October
  • Watering: If there is no rainfall, water every 15 days.
  • General care: The bed is empty; you can dig the soil and sow autumn/winter bedding plants (violets, stock).
  • Pests & diseases: The bed is empty.
November
  • General care: Not present in the garden.
  • Frost risk: If frost is expected, cover with frost fabric; if in a pot, move to a sheltered place. Damaged below approximately 0 °C.
December
  • General care: Not present in the garden.
  • Frost risk: If frost is expected, cover with frost fabric; if in a pot, move to a sheltered place. Damaged below approximately 0 °C.

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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