Double daffodils have a reputation for flopping in wet weather. 'Tahiti' is the exception. The flowers are fully double, golden yellow with orange-red segments through the centre, and the 16 to 18 inch stems hold them up through spring rain. It flowers late, after the trumpets, and holds its colour for two weeks or more.
It is excellent for cutting, where the double form reads like a small peony. Grow it in full sun with good drainage and leave the bulbs undisturbed; doubles resent being moved more than singles do.
Botrytis (grey mould)
Grey fuzzy mould on petals and stems, worst in cool wet conditions.
Remove affected parts immediately. Improve air circulation. Avoid overhead watering. Apply copper fungicide if severe.
Narcissus Basal Rot
Brown rot starting at the base of the bulb, spreading upward; soft, decaying tissue and stunted or failed growth in spring. Fungal growth may appear pink or white.
Discard infected bulbs. Plant only firm, healthy bulbs in well-draining soil. Avoid hot, wet conditions during summer dormancy and rotate planting sites.
Narcissus Yellow Stripe Virus
Yellow or pale streaks running lengthwise along leaves; distorted foliage and reduced flower size or vigor over successive years.
No cure. Remove and destroy infected plants. Control aphids, which spread the virus, and buy certified virus-free bulbs.