Temperatures?

Hiya,

Just wondering, what is the best temp to keep young seedlings at after they've germinated?

Mainly thinking about tender and HHA annuals and young perennials (specifically Coleus, Rudbeckia 'Cherry Brandy' and Verbena bonariensis).

Our house gets to 21º C with heating on, about 16 - 18 º C in the day usually, then can drop to 14ºC at night. I have a heated propagator that claims to warm the growing media by 8 - 10ºC.

A lot of the seeds have germinated and I've removed the covers but still have them on the heated tray.

Thanks
Jack

 

Hi Jack

Your windowsill are going to be well packed out I have said in other threads most hha and similar wont be able to go out until late April depending where you live I would imagine in Clapham you would be fine so thats over 8 weeks to keep them growing, I havnt planted any yet and wont until 2nd week of March I have learnt the hard way.

We have had a few new members on here planting away merrily with seeds and then wonder why they fail on the after care.

(18-21°C) is ideal but keep checking is best

 

I'd also like to add that later sowings very often over take the very early ones and produce stronger plants.

 

Ah ok. Thanks both. I've only done a small portion of each seed packet in this sowing. I thought it would be better to start early with these plants to get them to flower this year. I have the added problem of space as I need to get a series of sowings of plants from one windowsill to another until eventually outside in succession. It's a mini military operation but I've got some leeway into March if I need it then, which is good to know.

Ps I do have one cold frame outside too if that will help :-/

Sent from my iPhone using Tapatalk

 

I start most of my seeds in a heated propagator and as soon as they show I remove them as the heat makes them grow rapidly. Mine are now in a light bedroom with a background heat of 17/18C and no heat overnight. It's not warm enough yet to put them into a greenhouse or cold frame Jack. Mine won't go out there before the middle of April and even then I will keep a check on overnight temperatures.