Hey everyone! I'm looking for some advice on how to best overwinter my lupins and a few other seeds I started this spring. My lupins only grew to about 1.5 inches and I know they won't be flowering this year. Should I leave them in my greenhouse until next spring, or would it be better to plant them outside? I'm concerned about slugs if I put them outside, but I also tend to forget to check on plants in the greenhouse, which might lead to them drying out. I'm also curious about general tips for starting other seeds that would typically be flowering by now.
Another related question: I found some seeds on sale that have a planting date of January to March. Can I buy them now and save them for next year? Lastly, when it comes to plants like mimulus that I originally bought as established plants, how early would I need to start them from seed to have them ready for spring? Will they and other flowers like morning glories and pansies survive in an unheated greenhouse? Thanks for any insights!
4 Answers
Absolutely, hardy annuals can survive just fine when planted out either in late winter or even in an unheated greenhouse, though their growth will be slow through winter. I’ve had good luck with dianthus overwintering outside in the ground, but I haven’t been as successful with stocks. If you’ve got the space, it’s always worth a try!
Lupins are hearty perennials that can be left outside as long as they have enough light. If they’re in pots, keep in mind they’re more vulnerable to frost. They do thrive better in the soil where they can naturally absorb water, but of course, slugs can be a problem. A good tip is to mulch around them with sharp grit to deter the slugs while allowing proper drainage. They’ll die back in winter and usually come back strong in spring!
Just a heads up, a lot of perennials might not bloom their first year since they’re focused on establishing strong roots. Patience is key; they’ll come back with a bang next season!
Regarding those seeds you've found, most packets indicate a 'plant by' date, and generally, they can last for about two years, so yes! You can definitely hold on to them for next year. However, if you start those perennials now, you increase their chances of blooming next season. The idea of starting them in late summer is also solid for annuals like snapdragons and pansies; just be aware they'll need time to adjust come spring!
That’s awesome to know! I didn’t realize annuals could be started that early. I’ve been growing stocks and dianthus in pots. Should those stay outside or go in the greenhouse? Thanks for clarifying! ?