Coleus forum: A Great SUN HARDENED Coleus Collection

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Name: Jimmy Z
Point Pleasant New Jersey
Feb 19, 2016 3:35 PM CST
I have many cuttings from this large Coleus Pot which I successfully sun hardened last Summer. Will the rootings & curent seedlings I have growing from it also retain this Sun hardiness for the upcoming Summer?? Thank You!
Thumb of 2016-02-19/LovetheseBuggers/9acf3f

Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
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Feb 19, 2016 3:38 PM CST
Welcome to ATP.
I think the hardiness is for each individual plant,
and does not last through to cuttings or seedlings.
Name: Arlene
Southold, Long Island, NY (Zone 7a)
I was one of the first 300 contributors to the plant database! Tomato Heads Houseplants Garden Ideas: Level 1 Photo Contest Winner: 2014 Celebrating Gardening: 2015
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Feb 19, 2016 4:23 PM CST
My guess is that the cuttings will be fine, maybe not the seeds.
Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores Container Gardener
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Feb 22, 2016 7:37 AM CST
I also believe the plant genetics is what determines sun tolerance.
Do you know the varieties?
If so check with a grower like Rosy Dawn to see how they list the varieties you have.
Name: Tiffany purpleinopp
Opp, AL ๐ŸŒต๐ŸŒทโš˜๐ŸŒน๐ŸŒป (Zone 8b)
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Feb 22, 2016 5:48 PM CST
Once any plant has been inside for a while (a month a more,) the leaves are probably no longer used to that much sun.

Gradually introducing back to outside can help prevent sunburning the existing leaves, and is the conventional advice, but in the case of something that grows new leaves as quickly as Coleus, burning the leaves could be quicker than trying to acclimate the existing ones. That's what I usually do.

If they have retained the same color, leaf angle, and node spacing, they could be OK. Sounds like you have several of each. You could do half each way in case one doesn't produce good results.
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Name: Allison
NJ (Zone 6a)
Forum moderator Charter ATP Member I was one of the first 300 contributors to the plant database! Hummingbirder Region: New Jersey Dog Lover
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Feb 23, 2016 3:24 AM CST


Yeah I would take time setting them back outside.. slowly move them into a brighter area.. after being inside they do burn quickly no matter which verity

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