Free standard delivery when you spend £75 or more on full-priced plants | T&Cs apply

Our bulb shop is now open | Preorder now

Shop

Information & Help

My account

crocus
Wish-list My wheelbarrow

Perennials starting with 'o'

By type
Facing
How much sun
Soil type
Flowering month
Flower colour
Attractive to wildlife
Quick growing
Eventual size
Multibuy packs
Position
Soil moisture
Used at Chelsea
Sort by latin name
All items
Showing Perennials Special features : Suitable for containers clear all
5 items
Physostegia virginiana Crystal Peak White
Physostegia virginiana 'Crystal Peak White'
£9.99 - £37.99
9cm pot In stock (shipped within 2-3 working days)
3 × 9cm pots In stock (shipped within 2-3 working days)
6 × 9cm pots In stock (shipped within 2-3 working days)
1 star 1 star 1 star 1 star 1 star 5.0 5 1
Allium Globemaster

10% off

Allium 'Globemaster'
£7.19 - £35.98
1 × bulb Delivered during September
5 × bulbs Delivered during September
2 litre pot | 1 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.8 5 10
Allium stipitatum Mount Everest

10% off

Allium stipitatum 'Mount Everest'
£4.94 - £35.98
1 × bulb Delivered during September
3 × bulbs Delivered during September
2 litre pot | 1 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 3
Allium Gladiator

10% off

Allium 'Gladiator'
£16.19 - £42.30
5 × bulbs Delivered during September
15 × bulbs Delivered during September
2 litre pot | 1 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
1 star 1 star 1 star 1 star 1 star 5.0 5 1
Allium nigrum

10% off

Allium nigrum
£6.29 - £12.58
10 × bulbs Delivered during September
20 + 10 FREE bulbs Delivered during September
0.25 star 1 star 1 star 1 star 1 star 4.3 5 4

Copyright © Crocus.co.uk Ltd 2025. All rights reserved.