How to prune lobelia erinus 'techno heat blue'

Mid-summer after the first main flush, or when stems become leggy. Cut all stems back by one-third with scissors. Water thoroughly and apply a balanced liquid feed to support regrowth. New stems and flowers appear within 2–3 weeks. Remove any fully spent or brown stems at the base.

Once mid-season; deadhead lightly as needed between flushes. 'Techno Heat Blue' is bred for heat tolerance and extended flowering, but still benefits from a mid-season trim to prevent it from becoming straggly and to revive flowering. Shear back by one-third after the first main flush. Its heat tolerance means it recovers well and continues flowering reliably into early autumn in warm climates.

Cut all stems back by one-third with scissors. Water thoroughly and apply a balanced liquid feed to support regrowth. New stems and flowers appear within 2–3 weeks. Remove any fully spent or brown stems at the base.