It is possible that temperature fluctuation is necessary. There are variations between cultivars. Perhaps having outdoors when you don't have frost..
Chuck Chapman
---- Original Message ----
From: Dennis Kramb dkramb@badbear.com [iris-species] <iris-species@yahoogroups.com>
To: iris-species <iris-species@yahoogroups.com>
Sent: Thu, May 10, 2018 1:12 pm
Subject: [iris-species] Trimezia culture
Hey everybody,
I have 3 Trimezia steyermarkii siblings raised from SIGNA seed that are several years old now. Only 1 of them has bloomed and it's currently starting its 3rd or 4th bloom cycle (1st bloom was late autumn 2016). I'm growing them all in pots, indoors, under identical lighting/watering/temperature/soil conditions, so I can't understand why the other 2 plants haven't bloomed at all.
It gets stranger.... one of the unbloomed plants is only one-third the size of its siblings & increases vegetatively much more rapidly than the others..
Assuming the unbloomed siblings are legitimately Trimezia, what could I do to encourage them to bloom? bigger pots? stronger sunlight? new potting mix? change the humidity? day/night temperature swings? dig & divide? move them outdoors for summer?
Currently they're on a south facing windowsill indoors with no supplemental lighting. They're each in round 5" dia. pots about 6" tall.
Dennis in Cincinnati
