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October 25, 2010 · 6 Comments

Six Months of Gardening in Minnesota?

Climate

This past week, I picked basil in my garden and made pesto — a typical garden activity for August or September, but it’s late October in Minnesota and the garden has been growing strong since early April. The petunias on my front porch are in full — glorious, really — bloom, and with the wimpy frosts we’ve had, many annuals that have never been covered are still blooming like it’s mid-July.

orange marigold in bloom

Marigolds and other annuals are still blooming strong.

We’ve enjoyed more than six months of solid gardening in Minnesota this year — a season that is by my estimate at least two and maybe four weeks longer than normal. The combination of a near perfect winter with plenty of snowfall and an early snow melt followed by very moderate spring temperatures put most gardens two weeks ahead of normal this spring. On the backside of the season, an extended Indian summer has lengthened bloom and harvest times.

red salvia covered with frost

Salvia were hit by frost on Oct. 3, but much of the garden continues to grow well.

In my garden south of the Twin Cities, we had a legitimate frost Oct. 3, when the overnight temperature dropped to 32, but since then the weather has been more like mid-September than mid-October, adding weeks to the season for gardening in Minnesota. According to climate data maintained by the University of Minnesota, by late October all of Minnesota except its warmest spots (Minneapolis-St. Paul Airport, Winona, and Stillwater on the U’s chart) should have not only experienced a frost, but a hard freeze, which is an overnight temperature of  24 degrees F. We haven’t even come close to that — and while the forecast for this week calls for rain and cooler temperatures, overnight lows won’t fall much below 30.

Whether this is an aberrant year or the hallmark of a trend, it is both exciting and frightening to Minnesota gardeners. The prospect of another few weeks of warm weather means our gardening choices expand significantly. Japanese maples — no problem. Peach trees — sure, give them a try. Harvest lettuce from April until Thanksgiving — you can do it with a little cover.  Suddenly, we’re gardening more like Chicago or Des Moines than Fargo or Winnipeg. But with more heat (and possibly more precipitation) come new bugs and diseases and a great deal more uncertainty.  Can we plant longer season vegetables, like some melons and tomatoes, confidently? Or should we stick with proven plants and varieties? How much can gardeners “push the zone”?

For now,  gardeners may want to consider a two-pronged approach. First, rather than going strictly by the calendar, try using phenology — the study of nature signs — to determine when to plant or do other garden chores.  Several Minnesota websites describe these nature signs and their relationship to gardening. (My favorite is to plant peas when the spring peepers come out.) The second approach is purely practical: If you want to push the zone, don’t buy anything you can’t afford to lose. So, if you have your heart set on growing peaches in Minnesota, give it a shot, but plant your tree in the warmest spot you’ve got and be prepared to see a dead tree come spring.

In the meantime, I’m heading out to admire my flowers. This can’t last much longer. Really.

Related posts:

  1. Will Newly Planted Plants Survive a Cold Spell? With a couple of inches of snow falling and temperatures...
  2. First Bloom The seasons are changing rapidly here — and, in true...
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Comments

  1. meemsnyc says

    October 25, 2010 at 7:04 pm

    That’s great that you had extra weeks of the gardening season. It’s been unseasonabley warm this week and our plants love it.

  2. Karen says

    October 26, 2010 at 7:05 pm

    Yes, it has been the same here in Wisconsin, and it kind of gives me an unsettled feeling, too. As you say, more bugs to deal with, more diseases and the temptation to plant things way out of my zone and budget, too! So, yes, it’s been great on one hand and kinda creepy on the other. I like the idea of phenology, and will have to read up on it. I know my animals can sense when things are changing. Time for us to take heed. Now if we can just survive this wind storm! Hope all is well with you in Minnesota.

  3. Barbara says

    October 27, 2010 at 1:54 pm

    Like you say, it’s hard to know whether to be happy or suspicious about the long summer. And it’s sort of un-Minnesota-like, isn’t it. Your ideas about how to deal with it sound practical and doable.

Trackbacks

  1. Fall Bloomers | My Northern Garden says:
    October 27, 2010 at 3:16 pm

    […] My Northern Garden Sharing experiences and ideas about cold-climate gardening Skip to content HomeAbout MaryMinnesota Garden Blogs ← More than Six Months of Gardening in Minnesota? Yep. […]

  2. Lavender Blooms in December | My Northern Garden says:
    December 17, 2010 at 2:05 pm

    […] I brought in a French lavender (Lanvendula dentata) plant from outside in November. Because of the extended Indian summer we had — which now seems decades ago due to the relentless snow of the past week — this […]

  3. Garden Surprise: Lavender Blooms in December says:
    October 4, 2018 at 4:03 pm

    […] I brought in a French lavender (Lanvendula dentata) plant from outside in November. Because of the extended Indian summer we had — which now seems decades ago due to the relentless snow of the past week — this […]

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