How to Prune tulip 'Double Cardinal'?
Deadhead after flowering and remove fallen petals

tulip 'Double Cardinal' · Tulipa 'Double Cardinal'
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
Deadhead after flowering and remove fallen petals