How to Grow Plume Poppy
Macleaya cordata
Plume Poppy is a bold, imposing hardy perennial grown for its enormous glaucous blue-grey lobed leaves and towering feathery buff-pink flower plumes in midsummer. Plant in full sun or light shade in any reasonable soil. It spreads vigorously by rhizomes — plant where it has room or use a root barrier. New shoots emerge in late March; cut old stems to the ground in late autumn. Divide every few years in spring to control spread.
Yearly Lifecycle
Care Essentials
Apply a balanced general fertiliser in early spring as new shoots emerge. No further feeding needed — Macleaya grows vigorously in most soils without additional feeding.
Watch For
- Slugs (on young shoots)
- Powdery mildew in hot dry spells
- Rhizome spread into neighbouring plants
Companions
Miscanthus, Eupatorium, Persicaria, Rudbeckia
Care Requirements
Light
Full sun to partial shade
Thrives in full sun but tolerates light shade. In hot climates, afternoon shade prevents leaf scorch. Avoid deep shade, which causes lax stems.
Watering
Moderate; drought-tolerant once established
Water regularly in the first season to establish. Once established, Macleaya tolerates dry spells well due to its deep rhizome system. Avoid waterlogging.
Fertilizing
Light feeding in spring only
A single application of balanced general fertiliser as shoots emerge in spring is sufficient. Over-feeding encourages excessive and harder-to-manage spread.
Pruning
Cut to ground in late autumn
Cut all stems to ground level after the first frosts in late autumn. In spring, remove unwanted rhizome shoots around the plant's perimeter to control spread.
Spacing
90-120 cm; give it room to spread
Space plants at least 100 cm apart to allow for their spread. Use a physical root barrier (40-50 cm deep) if planting near borders you want to keep clear.
Support
None needed
The stout hollow stems are self-supporting even at full height of 2-2.5 m. Staking is unnecessary in all but the most exposed positions.
Growing Tips
Contain the spread
Macleaya spreads by rhizomes and can be invasive. Sink a physical root barrier (heavy-duty polythene or metal edging, 40-50 cm deep) around the planting hole before planting to keep it in check.
The flowers are the point
The enormous feathery panicles of tiny buff-pink flowers appear from July to August on stems up to 2.5 m tall. They make excellent cut flowers and are highly attractive to bees.
No staking needed
Despite its great height, Macleaya rarely needs staking. The stout hollow stems are naturally self-supporting even in moderate winds.
Divide to control
Lift and divide clumps every 3-4 years in spring. This keeps the plant from spreading too far and rejuvenates vigour. Surplus pieces can be potted up or given away.
