Deadheading Princess Lilies (Alstroemeria): Technique and Benefits

Why Deadheading Matters

Princess lilies (Alstroemeria) expend tremendous energy on seed production. Removing spent blooms redirects this energy to rhizome development—resulting in larger clumps and more flowers next season.

Proper Deadheading Technique

1. Wait until individual flowers fade (petals drop)
2. Cut stem down 1/3 of its height, just above a leaf node
3. Or remove entire flowering stem at base if all blooms spent
4. Use clean, sharp pruners

Seasonal Care Calendar

• Spring: Fertilize balanced 10-10-10 as growth emerges
• Summer: Deadhead weekly during peak bloom
• Fall: Stop deadheading; allow late seeds if desired
• Winter: Mulch crowns in cold zones (5-7)

Division for Vigor

Every 3-4 years, divide crowded clumps in early spring. Replant divisions with 3-5 growth points each. This rejuvenates planting and provides new plants.

Common Mistakes

• Removing only petals (leave ovary to form seeds)
• Cutting too low (damages crown)
• Neglecting deadheading (reduces future blooms 30-50%)