Originally Posted by Bob Hobden

"kerrygirl" wrote..


Hello,
I have flower seedlings growing in my greenhouse in a heated dome.
Marigolds, pansies, petunias, lobelia and alysum. My problem is the
alysum are tall, weak, falling over and dying and the lobelia seem to be
on pause. Do I need lights, even though the greenhouse has daylight on
all sides.

How tall should any seedling be?
When can I take them off the heat, my greenhouse read 3.5 oC last night.

The light levels in the UK at the moment are not good most days and then you
have the plants inside a greenhouse and then in a dome so two things
reducing the light levels reaching the plants still further. Coupled with
heat making them grow, they are hunting for light.
Personally I wouldn't plant seeds of those summer bedding yet, April at the
earliest, but then I won't chance the frost until Chelsea.
--
Regards. Bob Hobden.
Posted to this Newsgroup from the W of London, UK