Spring Planting Signs

Everyone knows that farming is dependent on the weather. Where I live, in hardiness zone 4b, we have short summers and long winters, so we really need to maximize our growing season. We want to get our plants in as early as possible; but how do we know when the ground is ready to plant? Too early, and our transplants won't survive and seeds will just rot. Here in Northwestern Wisconsin, frost-out can vary by weeks from year to year - it seems like sometimes the ground thaws out in March, and other times not until mid-April. So how do you know when it's safe to plant?

If you've read Laura Ingalls Wilder's classic book Farmer Boy, you may remember the scene where Almanzo and Alice are arguing about planting time:

At the end of the row he looked at the ash tree’s crumpled new leaves, and asked Alice if she knew when to plant corn. She didn’t, so he told her. Corn-planting time is when the ash leaves are as big as squirrel’s ears.
“How big a squirrel?” Alice asked.
“Just an ordinary squirrel.”
“Well, those leaves are as big as a baby squirrel’s ears. And it isn’t corn-planting time.”
For a minute Almanzo didn’t know what to think. Then he said:
“A baby squirrel isn’t a squirrel; it’s a kitten.”
“But it’s just as much a squirrel—”
“No it isn’t. It’s a kitten. Little cats are kittens, and little foxes are kittens, and little squirrels are kittens. A kitten isn’t a cat, and a kitten isn’t a squirrel, either.”
“Oh,” Alice said.

Squirrels and kittens aside, there are many signs from nature that give us hints at what's going on below ground. One rule of thumb I've heard is that if the weeds are coming up, cold-hardy plants like spinach, lettuce, and broccoli should be able to grow, too. Makes sense, don't you think? If it's warm enough for the "wild" plants to germinate, our cultivated plants should be able to, too.

A more specific tip I've read is that you should plant potatoes, beets, carrots, and peas when the dandelions start blooming. Now, I have dandelions growing right up next to my house that are about to flower, but I'm not going by that, since they're benefiting from the warmth coming off of the foundation - a very different microclimate than down in my garden. I need to look at the dandelions growing around my garden to see when that soil is ready.

Another tip I've heard is that when crocus flowers start blooming, you can plant peas, lettuce, spinach, cabbage, and broccoli. Or, if you don't have crocus flowers, you can plant these when the lilacs show their first leaves, or when the daffodils begin to bloom. In our neck of the woods, the daffodils are just sending up their first leaves right now, the lilac leaves aren't out yet, and unfortunately I don't have any crocus flowers planted on our new property. So it looks like I have a little time to wait before I should start planting - which I should note for next year, since the broccoli and Brussels sprouts I started indoors are more than ready to be transplanted! Ah, well. I'll know to start my seeds a little later next spring.

For the more tender vegetables like corn and beans, the old-timers said that you can plant these when oak leaves are the size of a mouse's ear - or, if you're more the Alice type, and want to be contentious about what size mouse, you can wait until the apple blossoms start to fall. Another sign is when the daylillies bloom; that's when you'll want to put out your tomatoes and peppers. And when the lilac flowers start to fade, then you can plant your cucumbers and squash.

In our modern, over-scheduled world, this seems very imprecise and hard to plan. I want to know when to start my seedlings indoors so they'll be at the perfect size when planting time comes! But any farmer will tell you, the real world doesn't necessarily run on your schedule. Some years spring will warm up early, other years you'll get snow the first week of June (my dad has a photo of snow on our lilac bush from a freak June snowstorm when I was a teenager). But knowing what signs to look for can help you know when your part of the world is ready to start growing again.