Hello Brian, .... need time till August to get going..... Okay, that explains everything. When do they start into growth? I had the same problem but now I use an ordinary propagator to start the rhizomes in March. As long as they are in the propagator I use small pots to save space. And as soon as they have sprouted and the leaves start to touch each other I remove them from the propagator and pot them up and give FULL SUN. The spring sun does not harm them. If you do that in your greenhouse you will have a lot of flowers. Now is the time to start dormancy. I also had the problem of plants (not only Gesneriads) not going dormant in a greenhouse that becomes too cold in autumn. A certain amount of heat combined with reduced watering is necessary to induce dormancy. If seasonal plants that normally do go dormant don't, they may be damaged by fungal disease or produce only small tubers/rhizomes/bulbs. The very valuable ones I bring inside into a moderately heated room to let them go dormant there. Not a very pretty sight, though..... but not for long. Bye for now, Uli