How to Fertilize Tulipa 'Formosa'?
Low-strength bulb fertilizer once pre-bloom and once post-flowering

Tulipa 'Formosa' · Tulipa 'Formosa'
Plant bulbs in late autumn, at a depth of 10-15cm (4-6in) in fertile, well-drained soil. Choose a sunny position, with protection from strong winds and excess winter wet. Lift bulbs annually, once the leaves have died down, and ripen in a cool greenhouse, keeping dry over the summer. See tulip cultivation for more details
Low-strength bulb fertilizer once pre-bloom and once post-flowering