Plant Darwin Hybrid Impression tulip bulbs in fall, several weeks before the ground freezes, so they get the winter chill they need to bloom in April.
Planting
- Unbox right away. Open the package on arrival and store bulbs in a cool, dry, dark spot with good airflow until planting day.
- Pick a sunny spot. Choose a site with full sun to partial shade and well-drained soil; tulips rot in soggy ground.
- Dig 6-8 inches deep. Set each bulb pointed end up, spacing bulbs 3-6 inches apart in clusters or drifts for the fullest look.
- Backfill and water in. Cover with soil, firm gently, and water once to settle the bed.
- Mulch lightly. Add 1-2 inches of mulch in colder zones to even out soil temperatures over winter.
Container Planting
- Use a deep pot. Choose a container at least 12 inches deep with drainage holes and quality potting mix.
- Overwinter cold. Leave pots outdoors in an unheated garage or sheltered spot so bulbs still get their chilling period.
Watering
- Keep soil evenly moist. Water during active growth in spring if rain is scarce.
- Let them dry after bloom. Reduce watering once foliage yellows; dormant bulbs prefer dry soil.
Feeding
- Feed at planting. Mix a bulb fertilizer or bone meal into the planting hole.
- Top-dress in early spring. Apply a balanced granular fertilizer as shoots emerge to support next year's flowers.
After Bloom Care
- Deadhead only. Remove spent blooms but leave the stems in place.
- Let foliage mature. Allow leaves to yellow and die down naturally so the bulb recharges for next spring, then clear the dry foliage away.