Posted: 25/02/2017 at 10:01
Can't find the advice i need, so:
I have never managed to grow SP from seed until this year when I bought fresh seed in November and planted them in root trainers in the GH same day. Pretty much 100% germination which is around 95% better than I've ever achieved before.
I have pinched these out about a month ago, they are now growing fast again - can I pinch out again like a penstemon cutting? Roots are through the bottom of the trainers. What should I do? Won't they be using up all the nutrients soon?
Just how frost sensitive are SPs? If I prepare a bed with compost etc and cover it for a couple of weeks to warm it will that be sufficient to stop them sulking or do I really need to wait to avoid any chance of frost? (I am in South Gloucestershire, Garden is walled but planting area is in exposed centre).
thanks in advance