Many tulips in our range flower at different times; the really tough tulips like the dwarf Kaufmanniana and Greigii, see pink Heart's Delight and red and white striped Pinocchio, will break through the frosts of March to reveal charming open flowers. Most of the standard Dutch style tulips bloom in April like those described as Single Early. Pure white Diana with her Purple Prince come under this category and have shorter stems to withstand the worse weather in early April. About two weeks later in mid-April, the Early Double tulips, with blowsy heavy heads and rich colours like Peach Blossom or precious Blue Diamond, will all be at their best. Their flowers last for a long time. The Triumph or mid-season tulips come towards the end of April and are a cross between Single Early and Darwin tulips boasting wonderful colours and are good for forcing. Taller Darwin tulips include the gorgeous Pink Impression which arrives in early May and by mid-May you see the extraordinary Parrot tulips varieties, the Viridflora Spring Green which naturalises well, and at a similar time the Lily and Fringed varieties.
With a season from March to May it pays to bear their flowering time in mind but this should never get in be the way of planting them as they can all go into the ground at the same time. Never plant them too early - from the end of October into early December is perfect.