Tag Archives: OSU Extension Service

Winter Gardening: Cold-Hardy Vegetables

Posted on by

CORVALLIS, Ore. –  Not ready to hang up your gloves and spade just yet?

The fearless gardener still has a chance to plant some cold-hardy vegetables to harvest next spring, said Jim Myers, plant breeder and researcher at Oregon State University. But don’t dawdle.

“Winter gardening is a risky business,” Myers said. “It may work one year with a mild winter but not another when the weather is more severe. If you plant some cold-hardy vegetables from mid-August to early October – depending on the crop – there’s a good likelihood you will produce something on the other end in the spring. They say farming is a gamble…some years more than others.”

Cold weather doesn’t kill these hardy plants; it simply slows their growth rate. For every rise of 18 degrees, growth rate doubles, but that guideline is only applicable for an air temperature range of 40 to 98 degrees, Myers said. If you plant cold-hardy vegetables from mid-August to early October, there is a chance they can mature by next spring if they survive in a vegetative state through the winter without reproducing.

According to Myers, the hardiest vegetables that can withstand heavy frost of air temperatures below 28 include: spinach, Walla Walla sweet onion, garlic, leeks, rhubarb, rutabaga, broccoli, kohlrabi, kale, cabbage, chicory, Brussels sprouts, corn salad, arugula, fava beans, radish, mustard, Austrian winter pea and turnip.

Semi-hardy vegetables that can withstand light frost of air temperatures in the range of 28 to 32 degrees include: beets, spring market carrots, parsnip, lettuce, chard, pea, Chinese cabbage, endive, radicchio, cauliflower, parsley and celery. For beets, spring market carrots and parsnips, the tops will die but the roots will tolerate lower temperatures.

Vegetables that contain the pigment anthocyanin, which gives them a vibrant red or purple color, are more resistant to rots caused by winter rains, Myers said. They include: purple-sprouting broccoli, Rosalind broccoli and purple kale.

If you live in an area of the state that gets prolonged snow cover, the fluffy white stuff acts as insulating mulch and warms the soil for these tough plants, Myers said.

No matter where you live in Oregon, “some of the worst problems we have in the winter are with rain rather than temperature, so protecting plants from the rain is quite helpful,” Myers said.

He recommends covering vegetables with high or low tunnels made from metal hoops and clear plastic, available from greenhouse supply companies. To protect plants, you can also use row covers or cloches. To warm the soil use mulch made from yard debris, cardboard or newspaper.

Cross your fingers and by next March you could be feasting on shelled, succulent fava beans seasoned with salt and lemon juice.

For more information on extending the gardening season, see the OSU Extension guides “Fall and Winter Vegetable Gardening in the Pacific Northwest” at http://bit.ly/OSU_FallGarden, “How to build your own raised bed cloche” at http://bit.ly/OSU_Cloche and “Garlic for the Home Garden” at http://bit.ly/OSU_Garlic. For an interactive map of Oregon’s first frost dates, go to the United States Department of Agriculture’s website at http://bit.ly/USDA_FirstFrostOR.

By Denise Ruttan denise.ruttan@oregonstate.edu

Source: Jim Myers  myersja@hort.oregonstate.edu

This story is online at http://bit.ly/OSU_Gardening2293

Cool-Season Crops

Posted on by
Get a head start gardening in western Oregon with cool-season crops:

CORVALLIS, Ore. – Is this dry winter making you anxious to dig in the dirt again? There’s some good news if you garden in western Oregon and are an optimist.

Cool-season plants can be directly seeded into the ground in March in the Willamette Valley and southern Oregon , said Bob Reynolds, the Master Gardener coordinator for the Oregon State University Extension Service in Jackson and Josephine counties.

Cool-season crops include peas, arugula, carrots, cabbage, cilantro, fava beans, kale, kohlrabi, spinach, chard, turnips and lettuce.

Reynolds said he’s getting questions from the public already about when to start planting and how to tell when soil is ready.

“It depends on how experienced they are and how long they’ve lived here,” Reynolds said. “If they’ve lived here long, then they know a week of 60-degree days doesn’t mean spring is here. You may be anxious, but you hold yourself back.”

Reynolds recommends using a soil thermometer to check your soil temperature to decide whether to dig in. Soil rather than air temperature is the bellwether of whether to plant, he said. Seeds such as peas will germinate at an average soil temperature of about 50 degrees. Each species has different temperature requirements for germination. Generally, cool-season plants can survive air temperatures as cold as 28 degrees, Reynolds said.

Cover the new plantings with clear plastic to protect the soil from getting too saturated by rain.

Snow provides a nice incubator for new plants, acting as a blanket to keep the coldest air from penetrating, Reynolds said.

You can start hand weeding any time. Wait until plants have established themselves before fertilizing them.

As for gardeners in central and eastern Oregon , they’re going to have to be patient. Direct seeding for cool-season crops is not possible until late April or May, said Amy Jo Detweiler, an Extension horticulturist in Redmond . Seedlings can be transplanted in May and June.

“We tell people that March is a good time to clean and sharpen your garden tools and take care of your houseplants,” Detweiler said.

March is also a good time for high-desert gardeners to study seed catalogs and prepare seed tapes. Seed tapes are good for plants that require thinning, such as radishes. To make a seed tape, cut a 2- to 3- inch strip the length of a newspaper or use tissue paper strips, 2-3 inches wide and however long you need it, Detweiler said.

When it’s time to plant, bury the seed tapes in the soil at the seed appropriate depth and the tissue paper or newspaper will break down into the soil, Detweiler said.

By Denise Ruttan, Oregon State Extension
Source: Bob Reynolds, OSU & Amy Jo Detweiler, OSU
This article is online at http://bit.ly/OSU_Gardening2236

Bird Feeders

Posted on by

Don’t let disease foul your bird feeder…

CORVALLIS, Ore. – As you’re welcoming wild birds into your yard this winter, be sure to keep your bird feeder clean and keep an eye on the health of your feathered diners.

“Sick birds will either be found dead or perched, often with feathers in disarray, eyes squinted or wings held out,” said Dana Sanchez, a wildlife specialist with the Oregon State University Extension Service. “Healthy birds are alert and mobile, whereas sick birds stand out because they are neither of those.”

Birds can get salmonella from bird feeders. Other diseases can spread when birds congregate or land on infected perches, Sanchez said.

“If the sick bird is associated with your feeders, take down the feeders and clean them,” she said. “It is probably a good idea to keep the feeders down for two to three weeks, until the disease has had a chance to run its course in the local population. Allow the bird to recover on its own. Make sure children, pets and free-ranging cats cannot get to the bird.”

Sanchez offered these tips to make sure your feeders are clean and free of mold for backyard visitors.

  • Clean your feeders once a month during low-use times and up to once a week during high-use periods.
  • Scrape off bird droppings and rinse or wipe clean the perches with a solution of 1 part vinegar to 20 parts water.
  • Hang your feeders where the feed won’t get wet. If seed in a feeder has gotten wet and compacted, remove the feed and discard it. Then clean the feeder with warm water and a brush.
  • Dry the feeder before refilling with the fresh seed.
  • If your feeder’s location is likely to get wet often, only fill it with a one- to two-day supply of seed at a time.
  • Clean up under feeders regularly and prevent accumulation of feed beneath the feeders by moving them occasionally. Seed on the ground can attract other animals, such as rodents, that you would prefer to not have near your home.

For more information about feeds and feeder placement, check out the following publication from the OSU Extension Service:  http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/19664/ec1554.pdf

Author Denise Ruttan, OSU Extension Service
Source: Dana Sanchez, Wild Life Specialist OSU Extension Service

Tomatoes

Posted on by

Coax Tomatoes & Peppers to Maturity
CORVALLIS, Ore. – There’s probably nothing more exasperating than working hard in the vegetable garden all summer, only to end up with hard green tomatoes, unripe melons, and sweet peppers the size of robin’s eggs.
Oregon ‘s cool springs and cool summer nights can prevent tomatoes and peppers from flowering and setting fruit early enough to grow to a decent size before the frosts of fall arrive.
Ross Penhallegon, horticulturist with the Oregon State University Extension Service, recommends using plastic sheeting to warm the soil. The sheeting comes in various colors including black, green and even red. Black seems to be the most popular color with vegetable gardeners.
“Lay sheets of black plastic on the soil where those heat-loving vegetables will be growing,” Penhallegon said. “The plastic absorbs heat during the day and keeps the soil warm during the night.”
Black polyethylene film in rolls three or four feet wide and 1 to 1.5 mils thick works fine, but Penhallegon recommends using thicker plastic if you want to use it for more than one season. If you want something that will decompose by the end of the year, look for black paper mulch.
Before planting peppers, melons and tomatoes, lay the plastic on the ground where the plants will grow. Cut six-inch holes in the plastic every two feet. If you use drip irrigation in your garden, put drip lines under the plastic.
If you use sprinklers to water, dampen the soil before you lay the plastic down and cut the holes larger to ensure that enough moisture enters the ground from the sprinklers.
Dig a hole for each transplant where there is a hole in the plastic. Then plant your plants. Be sure there’s enough plastic on all sides to cover a mature root system.
After everything’s planted, take a pitchfork and punch some holes in the plastic so water will soak through, but avoid the drip hose. Then weigh down the edges of the plastic with a few mounds of soil.
By Judy Scott, Oregon State University Extension Service
Source: Ross Penhallegon Oregon State University Horticulturist