This morning, 27th January, I am sowing the Lobelia seeds bought from Seekay (99p). When I saw that there were 3000 seeds I was surprised but now I’ve seen them I understand. They are really tiny dust like seeds and impossible to separate. I have sprinkled some on top of a seed tray of compost in which I have buried the tiny modules that my perennials arrived in from T&M last year. I did buy a packet of Lobelia seeds years ago and sprinkled them directly onto the soil on the flower bed at the allotment but they never grew. I shall probably use these half hardy annuals in containers and around the pond when it is done. I do prefer single colours and didn’t realise that I had bought mixed. If I am successful with them this year I shall buy them annually as they are a pretty space filler. Update 21st January 2018 – I had no success at all last year with these. I have sprinkled a pinch of seeds onto a pot of Dahlias that I have put together today.
Sow indoors, January-April. A warm kitchen windowsill is all you need for starting these seeds. Sow thinly on the surface of a small tray of pre-watered compost. Place in a warm, light position. Keep the compost moist. The tray can be covered to preserve humidity, but remove when seedlings appear, usually in 14-21 days. Transplant them, in tiny clumps, 2″ apart, to other trays when large enough to handle. Grow on in cooler, but not cold conditions. Gradually accustom young plants to outside conditions , before planting out, May-June, 15cm (6″) apart, into well-drained soil, when frosts are over. Flowers: June-October . Information from Fothergill Seeds.