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Vegetables
That Grow Well Over 7,000 Feet
by
Christy Hoyl, Master Gardener
We have had
frost as late as July and as early as August. But, there are strategies
that will make the best of the season we do have.
My organic vegetable garden consists of six raised beds. They are
constructed from landscapes timbers; two beds 4’x 12’
and four beds 4’x 8’. They are lined at a depth of 18”
with 1/8” inch wire mesh and filled with topsoil, compost
and manure. (My southern hillside area was over run with voles and
to control my frustrations, constructing the under-screened raised
beds solved the critter problem.) The beds are easier to weed and
take less water then conventional gardens. Eventually, this fall,
we will put cold frames over two of the beds to lengthen the growing
season for next year.
Garden location is extremely important at this altitude. Having
full, all-day sunlight is crucial for a bountiful harvest. Once
the growing season is over, amending the soil is beneficial and
it should be done every year. My son helps by spreading old horse
manure and our compost from the summer. Then we till it in to the
soil.
Many wonderful vegetables can be grown at this altitude. We are
in Zone 3. Zone 3 and some Zone 4 plants do okay. When buying
seeds look for varieties that can be harvested in the shortest amount
of time. I sow seeds directly in to the ground around late May.
I also buy plants such as broccoli and kale that have already been
started. You may want to start seeds inside 6 to 10 weeks before
setting plants outside. Remember to harden off the seedlings before
planting, thereby enabling them to toughen up. You can extend the
growing season at this altitude with “floating row covers”.
It is a light weight polyester fabric that creates a greenhouse
effect. You place it directly over the row of seeds or plants and
tie down with rocks. As the plants grow you loosen the fabric up.
It lets sunlight and water through and protects against frost. Find
it at most nurseries, gardening catalogs or on-line.
Here are some vegetables listed below that will grow well at altitude.
I have not grown all of them but most, and I understand that others
have had great success.
Root crops:
radishes, beets, carrots, turnips, parsnips, kohlrabi, onion, rutabaga,
garlic, shallots, leeks and potatoes.
Leafy vegetables:
lettuces ( black seeded simpson, romaine, bibb, arugula, mesclun
mix, salad bowl ) cabbage, chard, rhubarb, collards, brussel sprouts,
endive, escarole, garden cress, spinach, radicchio, and broccoli.
Herbs:
parsley, chives, cilantro. In containers on my deck: basil,
oregano, tarragon, rosemary.
Miscellaneous:
strawberries and peas.
Vegetables that prefer the warmth of floating
row covers:
green beans, potatoes and some squash.
I have tried to grow tomatoes and failed. They demand a nice long,
hot growing season. I know of folks who have greenhouses at this
altitude and they have great success with tomatoes. Every time I
have given it a try either the hail or frost nails them or the fruit
is small and green.
Other
crops that do not grow to harvest at altitude are:
corn, peppers, eggplant, cucumbers, melons, asparagus, pumpkins
and most squashes.
Relevant
Fact Sheets from the CSU Extension:
Planning
a Vegetable Garden: http://www.ext.colostate.edu/pubs/garden/07603.html
Root
Crops: http://www.ext.colostate.edu/pubs/garden/07604.html
Leafy
Vegetables: http://www.ext.colostate.edu/pubs/garden/07608.html
Fertilizing
the Home Garden: http://www.ext.colostate.edu/pubs/garden/07611.html
Saving
Seed: http://www.ext.colostate.edu/pubs/garden/07602.html
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