Posted: 12/09/2016 at 09:21
fireworks and all rubrum types are tender.....very tender....as you thought.
currently I have 3 pennisetum rubrum that I overwintered and now flowering. Even here they have, at best, only a 50/50 chance of surviving winters INDOORS. I lose them most years despite trying different methods.
this year they are later than usual to flower......they took a long time to come into discernible growth; prob not until July. I will keep them in the gh for longer next year...my eagerness had me put them out in June; mistake.
Can you keep them indoors anywhere a1154? You can't let them dry out either. And don't cut them before you see new growth .....they will look dead well into late spring so be patient
mean no insult to B&Q staff but very few are horticulturally trained I think. Even in the GC's this seems to be the case too