Patience, Provisions, and Planting for Beneficials
I. TIPS ON TIMING
Love those early warm spells, but don’t be in a rush to plant warm season vegetables. Warmer soil temperatures are important for the success of veggies like corn, beans and squash. If the soil is too cold and wet, germination will be slow and, worst case, seed may rot. Tomatoes, peppers and eggplant are really tropicals and prefer nighttime air temperatures consistently above 50 degrees. Nighttime lows below 50 will slow, if not permanently stunt their growth, so there is really no gain in transplanting them out too early, unless you put considerable time and effort into sheltering the plants until night temperatures warm; usually with heavy use of fossil fuel based products. (If you really feel compelled to plant them out early and build plastic tents, used wall-o-waters, etc. please wash and reuse the plastic product as many seasons as possible. To ultimately recycle, the plastic needs to be relatively clean. I put one piece at a time in with a load of laundry, then off to the recycler.)
Advice on Soil Temperature from the Oregon State University Extension Service
Crops that will germinate in the coolest soils (down to 40 degrees) include arugula, fava beans, kale, lettuce, pac choi, parsnips, peas, radicchio, radish and spinach seed.
With a soil temperature above 50 degrees, Chinese cabbage, leeks, onions, Swiss chard, and turnips can be planted.
When the soil warms to 60 degrees, warm season and many cool season vegetables can be sown, including beans, beets, broccoli, Brussels sprouts, cabbage, carrots and cauliflower. But be forewarned – beans will not tolerate any frost and may have to be planted again if the temperature goes below freezing.
Wait until the soil warms to above 70 degrees to plant warm season vegetables including tomatoes, eggplants, peppers, cucumbers, squash, corn and melons. Tomatoes, eggplants and peppers are slow-growing and take many weeks to grow to the stage where you can plant them out in the garden, so you might want to purchase these as starts from your local garden center. On the other hand, squash, cucumbers and corn grow quickly and are easier to start from seed.
Deborah Kean, an Oregon State University vegetable researcher, provides these hints to ensure further success with early season vegetable gardening:
• Wait to plant until the soil reaches the proper temperature for a specific crop.
• Buy cold-tolerant or short-season varieties.
• Warm the soil with plastic mulch, a cloche, a Wall-o’-Water, spun fiber or fabric “floating” row cover or cold frame.
• Be prepared to protect things if a hard freeze is forecast. Just because a crop has germinated and is starting to grow doesn’t mean it can’t be hit by a late frost.
• Prepare well-aerated soil with plenty of organic matter for a seedbed.
By: Carol Savonen
Source: Deborah Kean
Thermometers to measure soil temperature can be purchased at well stocked nurseries, such as Portland Nursery in Portland; The Gardener’s Choice in Tigard, or ordered via mail from Territorial Seed Company.
The Best Way to Plan Your Vegetable Garden
Our Vegetable Garden Planner makes it easy to draw out your vegetable beds, add plants and move them around to get the perfect layout. Either feet and inches or metric units are supported and any shape of garden can be created.
Whether you use traditional row planting, raised beds or Square Foot Gardening the Vegetable Garden Planner adapts to suit your gardening style.
Produce the Perfect Garden Plan
The Vegetable Garden Planner has over 130 vegetables, herbs and fruit and detailed growing information is just a click away. As you add vegetables the space they require is clearly shown by the colored area around each plant and it calculates how many plants will fit into the area. Crop rotation is easy as the Vegetable Garden Planner warns you where you should avoid placing each vegetable based on what was in your previous years’ plans.












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