Large-Flowered Tickseed Care
Coreopsis grandiflora
A sun- and heat-loving, long-flowering, easy-care perennial. It likes full sun and well-drained soils; regularly removing spent flowers (deadheading) is very important to encourage continuous blooming.
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; winter precipitation is sufficient. The plant is dormant.
- Pruning: Cut all the dry stalks and leaves left over from the previous season at ground level.
- General care: A suitable time for propagation and rejuvenation by dividing the roots every 3-4 years.
- Pests & diseases: Make sure drainage is good against the risk of root rot.
- Pruning: At the end of the month, cut all old and dead branches back to the base to prepare the plant for new growth.
- General care: Still a good time for root division (propagation).
- Watering: Keep the soil moist; if there is no rain, water every 15 days (15 L/m²).
- Fertilizing: At the start of the month, mix a very small amount of compost or slow-release balanced NPK fertilizer into the soil (excess fertilizer leads to weak growth).
- Plant protection: Check the newly emerging shoots for aphids.
- General care: New leaf rosettes become distinct. Be careful with snails and slugs.
- Pests & diseases: Snails and aphids are the most common pests.
- Watering: Once a week (15-20 L/m²); keep the soil constantly moist.
- Pruning: Not needed. Flowering begins.
- Plant protection: Continue controlling aphids.
- General care: Flower stalks begin to elongate.
- Watering: Continue regular watering once a week.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- Plant protection: Continue pest control.
- General care: The plant is in full flowering. It can also be used as a cut flower.
- Pests & diseases: Watch for powdery mildew (white powder on the leaves).
- Watering: In a long drought, water deeply once a month.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: This pruning revitalizes the plant and extends flowering.
- Pests & diseases: Powdery mildew can be prevented with good air circulation.
- Watering: In midsummer, deep watering every 15-20 days is enough. Established plants (over 2 years old) do not need watering in most years. Water so that the soil is wetted to a depth of 10-15 cm from the surface.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: The plant continues to flower throughout summer.
- Watering: In midsummer, deep watering every 15-20 days is enough. Established plants (over 2 years old) do not need watering in most years. Water so that the soil is wetted to a depth of 10-15 cm from the surface.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: Flowering continues.
- Watering: In a long drought, water deeply once a month.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: The best time of year to plant new seedlings or to propagate an existing plant by division. If you want it to spread by itself from seed, let the last flowers set seed.
- Watering: Autumn rainfall is usually sufficient; if the weather turns dry, water every 15 days.
- Pruning: You can keep removing spent flowers.
- General care: Flowering slows down and ends.
- Watering: Not needed; rainfall is sufficient.
- Pruning: After the plant has gone dormant, you can cut all dry stems at ground level.
- General care: It enters winter dormancy.
- Pruning: Cut all the dry stalks at the base for winter cleanup.
- General care: Dormancy period.
- Pests & diseases: Heavy soils that stay wet in winter can cause root rot.
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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