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Growing From Seed

in Plants
Hello, I am new to gardening and I'm am so delighted to have found you all 😁 I have sown Achillea Millefolium seeds a few days ago. My question is, once they germinate can I put them in an unheated plastic greenhouse through winter? I live in Glasgow.
Many thanks
Frances
Many thanks
Frances
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When you don't even know who's in the team
S.Yorkshire/Derbyshire border
"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."
The plastic greenhouses are pretty useless unfortunately - they'll only keep the rain/snow off plants, and need tied to a wall/fence to stop them disappearing. They don't provide any warmth at this time of year. They're fine for small plants [already growing] that just need that basic protection.
If they germinate, and grow at all, they'll probably need to stay in a cool room indoors to make it through winter as it would be tricky to get them acclimatised to go in a sheltered spot outside. They would need to be at the stage of pricked out, potted individually, and growing well to do that too
I live in west central Scotland - not where that photo is...
It's very late in the year to be sowing Achillea, but you may find that if this mild weather (even in Scotland) continues you may well get some to germinate.
If that happens, l would personally keep them indoors, maybe in an unheated room or porch if you have one. They are classed as hardy perennial (l believe), but young seedlings will struggle at this time of year. Lower light levels as well as cold weather play a part.
A lot also depends on your conditions, if you have a very sheltered garden and can add some fleece in extremely cold spells they might make it.
Personally l would see what happens, but don't expect too much, and plan to sow again in the Spring (and go by your weather conditions, not necessarily the dates shown on the seed packet ).
Welcome to the forum
It can be very misleading if you follow the info on seed packets because it doesn't take the variations in climate and location around the country into consideration.
I live in west central Scotland - not where that photo is...
This forum would have been very helpful if it had existed when I started gardening!
If you have plenty of sweet pea seeds, it can be worth trying a few anyway, just to see what happens. Unfortunately, if they're outdoors, you can get mice eating the seed though.
Experiment a bit though - germinate inside, and then see if you can gradually get them outside. It's been very, very mild here, so you never know.
I live in west central Scotland - not where that photo is...