When to harvest frost hardy plants?

new_gardener5September 22, 2013

I started getting a feel for when to harvest my not frost hardy plants this fall. But how long could I keep frost resistant or frost hardy plants out? I'm in zone 3. So when do you harvest frost hardy plants in the fall, i.e. crops like turnips, cabbage, brussels sprouts, etc...? Does the advice dictate that you need to watch the weather day to day, and are there guideline for beginners and then more advanced instructions? thanks

Thank you for reporting this comment. Undo

There's no set guideline. You just have to eyeball it, by looking at plant health and day & night temperatures. Plants tolerate cold nights better if the days are warm. If the days are cold (single digits) and dark, the plants will quickly deteriorate. Also, if you use row covers, you can add a few additional weeks or more of a harvest window.

In general, don't leave root crops in after the soil begins to freeze (usually around Halloween in SK but this varies from year to year). However, carrots and beets tolerate this better than radishes and turnips.
Some leaf crops are very hardy, things like kale and spinach can take -12 C before they begin to show damage. Cabbage is a little less hardy. I haven't grown brussel sprouts but I believe they should be good down to -10 C as long as the plant has had a few nights to acclimate. Again, watch the daytime temperatures.
In most cases, the first lasting snowfall in early November is the time you pick everything. You can still leave kale in the ground but it's too much a bother to try to harvest it under the snow.
I use row covers to prolong the harvest to Remembrance Day most years (last year was an exception). I live near Saskatoon.

Avoid harvesting anything while it is still frozen. Wait until late afternoon to let everything thaw out and perk up before you harvest.

This post was edited by Slimy_Okra on Mon, Sep 23, 13 at 0:21

    Bookmark   September 23, 2013 at 12:17AM
Sign Up to comment
More Discussions
Cilantro tricks?
Does anyone have any advice to get more leaves out...
Rudbeckia fulgida 'Goldsturm' hardy on the prairies?
I don't recall if I've ever seen this plant alive and...
Anyone Growing Peaches in the far north??
Hi, I bought two contender peach trees last year. Everyone...
Tradescantia Overwintering and Cultural requirement
Tradescantia �Blue and Gold�...
Primocane raspberries? Zone 3 north of Edmonton
Does anyone around Edmonton grow a primocane raspberry?...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™