Definitely do as chicky says, Red Dahlia. Don't re-pot them until they are almost climbing out on their own! Keeping them in pots/tubs also means you won't get them bullying other things in your borders!
A trowel in the hand is worth a thousand lost under a bush.
Hi Bob, like you I have a several plants (Headbourne Hybrids) grown from seed two years ago. They are presently over-wintering on the window cill in my study - which incidentally is quite a cold room! However being South West facing the cill is quite exposed to sunlight and the pots do dry out from time to time. The leaves on two of the smaller plants have now mostly turned yellow and have been removed, the leaves on the larger plans are still green and are quite substantial - do you think I should move them to a darker room or should this have been done earlier in the autumn/winter?
Hi ruleyo, I would only keep them indoors when it is frosty as they are generally hardy. In mild winters one of mine (now a mature plant) is evergreen and keeps its leaves over winter even in the border. I think ones grown from seed have quite a variation in range as to how hardy each individual plant is. Having said all of that, I don't think they'll come to harm indoors if in a cold room and the smaller ones might even appreciate it given the current wet weather! Like most plants they don't like both cold and wet so always err on the side of keeping them drier rather than overwatering.
A trowel in the hand is worth a thousand lost under a bush.
Hiya Bob! I've saved seed from my plants this year and wonder if you have any advice as to when and how to sow them? With most things I sow in a plant pot of multi purpose compost and cover with fine grit then leave either in my unheated greenhouse or on the kitchen window sill. Any advice?
Hi GG, that's exactly what I do. I do sow mine as soon as they are ripe so as you are a bit late I would recommend that you sow them now and keep half in the cold GH and half on the kitchen windowsill. Dry agapanthus seeds don't last well so the sooner you sow them the better in my opinion.
A trowel in the hand is worth a thousand lost under a bush.
Thanks Bob. I'll do it as soon as the rain stops long enough for me to run to the greenhouse. It's always a pleasure to be there as it seems to stay warm, and I have overwintering succulents and rooted cuttings up there, so the optimism for the coming year.
Thank you Bob - great excitement today as I see little green shoots coming up in the indoor flower pot - to wet to see if anything is happening in the greenhouse. It's always a surprise when self-saved seed of something a tiny bit unusual manages to germinate, but these days I'm prepared to have a go at growing anything that|I can gather seeds from. I'm sure they will grow on nicely and just wonder now if they will come true to the parent plant which was blue.
Posts
Definitely do as chicky says, Red Dahlia. Don't re-pot them until they are almost climbing out on their own!
Keeping them in pots/tubs also means you won't get them bullying other things in your borders! 
Lovely thanks
Hi Bob, like you I have a several plants (Headbourne Hybrids) grown from seed two years ago. They are presently over-wintering on the window cill in my study - which incidentally is quite a cold room! However being South West facing the cill is quite exposed to sunlight and the pots do dry out from time to time. The leaves on two of the smaller plants have now mostly turned yellow and have been removed, the leaves on the larger plans are still green and are quite substantial - do you think I should move them to a darker room or should this have been done earlier in the autumn/winter?
Hi ruleyo, I would only keep them indoors when it is frosty as they are generally hardy. In mild winters one of mine (now a mature plant) is evergreen and keeps its leaves over winter even in the border. I think ones grown from seed have quite a variation in range as to how hardy each individual plant is. Having said all of that, I don't think they'll come to harm indoors if in a cold room and the smaller ones might even appreciate it given the current wet weather! Like most plants they don't like both cold and wet so always err on the side of keeping them drier rather than overwatering.
Many thanks Bob, I'll start to harden them outside once the weather starts to warm up.
Ruleyo
Hiya Bob! I've saved seed from my plants this year and wonder if you have any advice as to when and how to sow them? With most things I sow in a plant pot of multi purpose compost and cover with fine grit then leave either in my unheated greenhouse or on the kitchen window sill. Any advice?
Hi GG, that's exactly what I do. I do sow mine as soon as they are ripe so as you are a bit late I would recommend that you sow them now and keep half in the cold GH and half on the kitchen windowsill. Dry agapanthus seeds don't last well so the sooner you sow them the better in my opinion.
Thanks Bob. I'll do it as soon as the rain stops long enough for me to run to the greenhouse. It's always a pleasure to be there as it seems to stay warm, and I have overwintering succulents and rooted cuttings up there, so the optimism for the coming year.
Thank you Bob - great excitement today as I see little green shoots coming up in the indoor flower pot - to wet to see if anything is happening in the greenhouse. It's always a surprise when self-saved seed of something a tiny bit unusual manages to germinate, but these days I'm prepared to have a go at growing anything that|I can gather seeds from. I'm sure they will grow on nicely and just wonder now if they will come true to the parent plant which was blue.