On 03/05/2016 14:01, Martin wrote:
On Tue, 3 May 2016 13:45:45 +0100, Peter Percival
wrote:

When should one plant crocuses, tulips and bluebells?

The Keukenhof plants crocuses & tulips in November.



Agreed. Crocuses and tulips should be planted in November. Bluebells
can be planted in Autumn too, or in late Spring "in the green" (in
growth, with leaves on), after flowering, which is useful if you're
transplanting them.
--
Spider
On high ground in SE London
Gardening on heavy clay