Bachelor's Buttons

lonmower(zone8 Western Oregon)March 7, 2007

I am in zone eight (western oregon)

In January I opened my cold frame (nothing inside) for several weeks. Later I noticed bachelor buttons sprouting behind the frame and have come to realize that the sun shining thru the thick glass heated the soil.

Well, owing to the fact we still faced cold weather, I dug up many and put them in the cold frame (with the door closed) and they have done very well. Many are 4-6" tall and very vigorous.

My question is: "How frost resistant are these starts?" I want to relocate them in my garden. We will still have a few mornings of semi-heavy frost and I don't want to lose them.

Help appreciated


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Judy_B_ON(Ontario 5B)

Batchelor's Buttons (Centaurea cyanus) is not a North American native plant. It is an introduced garden annual and is considered an invasive noxious weed in some states.

It is not frost tolerant and should not be set out in your garden until all risk of frost is past.

Here is a link that might be useful:

    Bookmark   March 7, 2007 at 9:37PM
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I have many bachelor's buttons sprout from last year under my fruit trees. We had some cold spell and tempature went down to low 30s at some nights, but they've done just fine and now they are about 4-5" tall.

    Bookmark   March 8, 2007 at 9:34AM
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