Xref: kermit uk.rec.gardening:240688

In article , Dave Poole
writes
All Callistemons flower on shoots produced in the previous year and
the large buds at the very tips of those shoots produce the flowers.
If these are damaged by frost or cut off by pruning at the wrong time,
the flowers will be lost for that year. Any pruning should be carried
out immediately after the flowers have faded. I usually cut away the
old flower heads together with a few inches of stem. This method
forces the production of 3 or 4 good strong shoots, each of which will
flower the following year.

So if I have a Callistemon of uncertain parentage given to me as a
cutting, which has not yet flowered and is getting a bit leggy (I've run
out of S facing wall and it's in the greenhouse) I should be OK pruning
it early in the season but shouldn't prune it much later than now?
--
Kay
"Do not insult the crocodile until you have crossed the river"