Hypericum perfoliatum Care
Hypericum perfoliatum
A perennial herbaceous plant known for its leaves that appear to pass through the stem, whose above-ground parts die back in winter. It is extremely tolerant of drought and poor soils and can spread and expand by its roots.
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.
- Watering: Not required, natural rainfall is sufficient.
- General care: To control its spread, root barriers can be used or the edges can be dug.
- Pests & diseases: Carry out general observation. Frost protection is not needed; it is very hardy.
- Pruning: Cut all of last year's dry stalks close to ground level before new growth begins.
- General care: Clear weeds.
- Watering: Not required, natural rainfall is sufficient.
- Fertilizing: Not required, it prefers poor soils; do not overfeed.
- Pruning: Prune just before the shoots break. Because flowers form on this year's new shoots, hard pruning increases flowering.
- General care: New shoots emerge quickly from the rhizomes.
- Watering: If there is no rainfall, water every 15 days.
- Watering: If there is no rainfall, water once a week.
- 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.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. Water around the roots to a depth of 15-20 cm.
- General care: Flowering begins.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. Water around the roots to a depth of 15-20 cm.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. Water around the roots to a depth of 15-20 cm.
- General care: The plant forms seed and gradually draws its energy down into the roots.
- Watering: If there is no rainfall, water once a week.
- Watering: If there is no rainfall, water every 15 days.
- Pruning: You can cut dry stems now if needed.
- Pruning: Cut all the dry stalks for winter cleanup.
- General care: Collect fallen leaves; many disease agents and pests overwinter under leaves.
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.
Browse all plant guides