Daffodils flower from late April until June depending on types.
The first ones to flower are the N. cyclamineus hybrids and the last to bloom are cultivars with double flowers. The bulbs are toxic and the sap can cause skin irritation on sensitive skin.
Daffodils are categorized into 13 divisions according to flower size and shape: :
V. Triandrus cultivars
VI. Cyclamineus cultivars
VII. Jonquilla cultivars
VIII. Tazetta cultivars
IX. Poeticus cultivars
X. Bulbocodium cultivars
XI. Split corona
XII. Other cultivars
XIII. Species and wild varieties