Watering
Water in newly planted camassia bulbs. After this, they should get enough water from the rain. Water during prolonged dry periods and keep an eye on bulbs planted in containers. Water them freely during a drought.
Fertilising
Camassias generally don’t need added feed, but those growing in a border can be mulched.
Deadheading
Only cut back foliage when it has completely died back in summer. Flowers can be cut off at the base once they’ve faded unless you’re planning to save the seed.
Propagating & Dividing
Camassia bulbs will gradually clump-up over time. To divide, lift the bulbs in summer (after flowing, when the bulbs are dormant), and then separate the clumps to plant elsewhere in the garden.
Bulbs can be propagated by removing the offsets that have formed around the main bulbs – these can be replanted individually.
Alternatively, collect seed when it is ripe in early summer. Sow in a seed tray and leave it in a cold frame to germinate. It can take up to three years to flower.
Overwintering
Camassia bulbs planted in containers should be placed somewhere frost free. Bulbs in the ground are usually hardy, but if you live in a very cold area of the UK, the soil should be mulched to protect the bulbs in late autumn.
