15. Irrigation
Irrigation is essential, either overhead sprinklers if growing‐on tubers, or
ground level drippers for cut flower production. Keep soil moist from planting
to flowering. Reduce water when bells fade and go brown, ensuring soil does
not dry out before lifting.
Overhead sprinklers (40 psi) must be closely spaced to get good coverage,
especially outdoors to allow for wind drift. Ground level drippers (e.g. T‐Tape)
or spray type emitters have the advantage of keeping foliage dry and reducing
risk of botrytis. Ensure enough trickle lines are laid across the beds so that all
plants receive sufficient water.