Seeds forum: Frost tolerance of sunflowers?

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Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
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kqcrna
Apr 10, 2012 8:56 AM CST

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I wintersowed these when weather was warm. Now it's cold again. Seedlings are pretty tall with 2 to 3 sets of true leaves.

If transplanted to the garden now, will they tolerate some frost?

Karen
Name: Michele Roth
N.E. Indiana - Zone 5b
I'm always on my way out the door..
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chelle
Apr 10, 2012 6:59 PM CST
I've seen sunflower seedlings in the fall that tolerate several hard frosts before succumbing to the cold.

Since yours were wintersown I'd think they'd be good candidates for a trial. Do you have more of these seeds, just in case?
Cottage Gardening

Newest Interest: Rock Gardens


Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
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kqcrna
Apr 10, 2012 7:43 PM CST

Moderator

I grew these for a friend with a black thumb, special request. Only a few seeds left I think, and I'm going to give her the seeds to direct sow too.

I'm having lunch with my friend tomorrow, and will give her the plants. I was just wondering if it's safe to plant them out yet. They really do need to escape to the ground. They're getting huge!

Karen
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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Onewish1
Apr 11, 2012 3:25 AM CST

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I always feel fall plants can take more abuse since they are not tiny .. but don't know for sure if they can take it or not.. I don't grow them too often they always get eaten around here
Name: Michele Roth
N.E. Indiana - Zone 5b
I'm always on my way out the door..
I was one of the first 300 contributors to the plant database! Forum moderator Garden Sages Garden Ideas: Master Level Dog Lover Cottage Gardener
Native Plants and Wildflowers Plant Identifier Organic Gardener Keeps Horses Hummingbirder Hosted a Not-A-Raffle-Raffle
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chelle
Apr 11, 2012 4:16 AM CST
Those fall seedlings were from some seeds that the birds dropped in a pail with a couple of inches of dirt in it. Possibly from the same season's bird started plants since I don't feed them during the summer.

Interesting side-note: I have a few Maximillian seedlings (about an inch and a half tall) that I noticed were pulled from the dirt one day. I didn't see much in the way of roots left on the stalks but I tucked them back in anyway, just to see what would happen. This was about 10 days ago, and they're still alive. They're growing under cover, but without supplemental heat.

So far, all of the sunflowers I've started are perennial types.
Cottage Gardening

Newest Interest: Rock Gardens


Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
Image
kqcrna
Apr 11, 2012 4:37 AM CST

Moderator

Hopefully after this current cold snap (32° now) we'll be safe from frost.

Karen
Name: Michele Roth
N.E. Indiana - Zone 5b
I'm always on my way out the door..
I was one of the first 300 contributors to the plant database! Forum moderator Garden Sages Garden Ideas: Master Level Dog Lover Cottage Gardener
Native Plants and Wildflowers Plant Identifier Organic Gardener Keeps Horses Hummingbirder Hosted a Not-A-Raffle-Raffle
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chelle
Apr 11, 2012 5:11 AM CST
I hope so, too. I have annual sunflowers to start as soon as it warms a bit. If I wait too long I generally forget to plant them.
Cottage Gardening

Newest Interest: Rock Gardens


Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
Image
kqcrna
Apr 11, 2012 5:22 AM CST

Moderator

We're still supposed to have lows in the 30s tonight and tomorrow night. After that it looks better. Maybe the rest of the wintersown things will start to show some growth (if they don't freeze first!).

One more tomato sprouted yesterday, but they're all tiny. I have them in 16 oz. cups, in the same bin as the huge sunflowers. The sunflowers shade the maters from sun. Once I get the sunflowers to my friend today, the tomatoes should be able to get a little more sun.

Karen
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
Seed Starter Container Gardener Garden Ideas: Level 1
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Onewish1
Apr 11, 2012 6:28 AM CST

Moderator

we are looking good after sat or sunday

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