Posts Tagged ‘soil’

Work it, Girl! (Uh, Unless the Soil is Wet)

Yesterday I was telling my friend, Phenom, how the rain has been killing me, because the soil has been wet for over a week, and will likely continue to be wet for at least the next week, so I can’t get in and prepared the rest of the beds because you aren’t supposed to work the soil when it’s wet. She started at me blankly and suggested that maybe this would be a good blog post. So here it is.

The rule does seem a little random. Like something competitive gardening-types would say to everyone loudly, and then turn around and secretly work in thunderstorms when no one is watching. And then laugh with their friends over tea as their gardens flourish while everyone else is left scratching their heads with lame gardens.

But after some research, I can assure you that it is true: Do not work the soil when it is wet.

Garden soil ideally has a porous structure. When the soil is wet, and you start moving it around, it becomes much more dense, becoming impermeable to air, water, and even the plant root system. Yesterday I was paging through this book: Plant Propagation in Pictures, and the author demonstrates how seeds will not even germinate in soil that has been worked when wet.

If you were impatient this year, the gardening nerds at Cornell (I say this with love) have a great article for you.

From my own experience with compact soils, I can say that adding vermiculite to my perennial raised bed has completely improved the health of all the plants therein, without adding any new soil or compost. In 2010, when I built the raised bed, I just hauled in compost, but was too lazy to add in vermiculite in the first place, thinking that it wouldn’t be a big deal. This spring I finally got to it, and the change is extreme. What used to be tiny little strawberry plants have turned into ginormous monsters.

It looks like wet, compacted soil may be a problem in my community garden plot. Hopefully by the time the soil dries out for me to work on it, my plants at ground level, on the left, will still be alive!

Local Soil Temperature

If you’re like me and stressing out about planting at exactly the right time, too impatient to wait until next week to start planting, too anxious to  plant right. now., and too lazy to stick a thermometer in the ground and do math, go to the Soil Temperature and Pan Evaporation Tables by the Minnesota Climatology Working Group.  Other states should have similar data available through an extension office.  Every week they post the new soil temperature average for the past week for a variety of areas.

This table from the UMN Extension Service shows optimum germination temperatures for some veggies. I pulled out the temperatures leading to the shortest germination times for my own interest:

Asparagus 77
Lima Bean 77-86
Snap Bean 86-95
Beet 77-95
Cabbage 86
Carrot 86
Cauliflower 68
Celery 68
Sweet Corn 95
Cucumber 86-95
Eggplant 86
Lettuce 77
Muskmelon 86
Okra 95
Onion 77-86
Parsley 86
Parsnip 68
Pea 77-86
Pepper 77-86
Radish 86
Spinach 77
Tomato 77-86
Turnip 77-95
Watermelon 95
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