Ruby Giant
Large violet-blue flowers with a strong show in late winter and early spring.
When to plant Crocuses in Cambridge
Crocus spp.
Hardy spring-flowering corms for free-draining soil. Plant in autumn, then leave the foliage in place after flowering so they can feed next year.
12 cm · Full Sun · Low Water
Calibrated to Cambridge · last frost ≈ 7 May
| Activity | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant out | No | No | No | No | No | No | No | No | Yes | Yes | Yes | No |
Growing guide
What to do through the growing season
01
Plant Corms
4 Sept to 2 NovPlant corms during 4th September - 2nd November, pointy end up, about in free-draining soil. Space apart. Water in.
- Put mesh on after planting. Take it off when shoots show.
02
Enjoy the Flowers
21 Feb to 17 Apr 2027From 21st February 2027 to 17th April 2027, enjoy the flowers. They take sun or a little shade. In pots, keep compost moist while they grow. Never waterlogged.
03
Deadhead Spent Blooms
26 Feb to 27 Apr 2027Remove faded flowers from 26th February - 27th April 2027.
03
Let Foliage Die Back
17 Apr to 29 May 2027Leave the foliage in place from 17th April 2027 until it yellows. Do not mow until then.
Companion plants
Tap a plant to see why it works (or doesn't) with Crocus.
Good companions
Plants to avoid
Why companion planting matters
Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.
Suggested varieties
Popular varieties of Crocus to consider
Blue Pearl
Pale blue flowers that work well in pots and the front of borders.
Flower Record
Reliable purple flowers that naturalise well in grass and open borders.
Golden Yellow
Clear yellow flowers for a bright early display in beds and containers.
Related plants
Explore similar plants you might like
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Brussels Sprouts
Sow indoors March to April, plant out May to June, harvest September to February. Frost risk October to May.
Calabrese
Sow indoors March to April, plant out May to June, harvest July to October. Frost risk October to May.
Crocus guides by town
See how Crocus timing shifts in other towns with different frost dates.