|Approximate height:||Up to 1m|
|Flowering Time:||June to September|
|Site and soil type:||Prefers moist but well drained soil in sun or semi-shade|
|When to sow:||Spring to early autumn|
|Where to sow:||Outside, direct into soil or under cover, into trays, modules or pots.|
|Packet contents:||Approximately 45 seeds / 0.3 g|
Greater Knapweed, sometimes called Black Top, is an upright plant with attractive buds opening to purple flower heads.
It blooms from June to September and is very popular with bees, butterflies and moths.
Greater Knapweed attracts / provides food for the following creatures:
- Moths, including: Marbled Clover moth 🐛, Narrow-bordered Five-spot Burnet moth 🦋, Scarce Forester moth 🦋🐛 and Six-spot Burnet moth🦋
- 🦇 (RHS)
- An "RHS Plants for Pollinators" plant **
All our seed packets include sowing instructions.
Jemima’s Garden seeds are plastic free and reyclable. They’re contained in an inner glassine envelope, (made from pine wood cellulose), and an outer Kraft paper seed packet. Any shipping packaging is also plastic free and recyclable.
Key to symbols:
🐛 A food plant for the caterpillar
🦋 Provides nectar for the adult moth or butterfly
🦇 (RHS) Listed in the RHS Plants for Bats list
** RHS Plants for Pollinators. The RHS Plants for Pollinators mark is only given to plants that support pollinating insects. Find out more at rhs.org.uk/plantsforpollinators
** The Royal Horticultural Society, and its logo, are trade marks of The Royal Horticultural Society (Registered Charity No 222879/SC038262) and used under licence.