When to Plant Vegetables
by Chip Phelan
If you’re planting
a vegetable garden you’ll want to pay close attention to
frost and freeze dates to determine when to
plant. This article
gives an overview of how to determine when to plant and
offers links to additional online resources for
determining your frost and freeze dates.
Planting times for vegetables and other annual plants vary from
species to species. In much of the United States the prime
consideration is the date of the last spring frost/freeze. Many
vegetables can be planted up to four weeks before the last
frost, while others need to wait until a couple of weeks after
the frost.
Another consideration is the date of the first fall
frost/freeze. In northern latitudes, where summers can be
short, the length of time some vegetable species take to reach
maturity (most notably tomatoes and peppers) make it necessary
to plant vegetable seeds indoors and then transplant the
seedlings outside at the appropriate time.
Other vegetables and fruits, such as winter squashes and some
melon varieties, seem to do better when planted as seeds
directly where they are going to stay. With maturation times up
to twelve weeks, it may be critical to get vegetable seeds
planted as early as it is safe to do. If you have a short
growing season, and wish to grow these crops, choose vegetable
varieties that will reach maturity within a safe time period
for your area.
My personal observation has been that vegetable seed crops
planted at their earliest safe date are less likely to fall
victim to insects than later plantings. If you have a small
vegetable garden it’s not too difficult to reseed if a surprise
late frost damages a particular crop.
Many vegetable plants that are planted in the spring can be
planted again towards the end of the season. Again it is
important to know what date you can expect the first frost.
By understanding the times and length of frost free weather in
your area you can have a better chance for success in your
vegetable garden.
The National Climatic Data Center has a data sheet online that
can be downloaded as a pdf file or viewed online. The data
sheet contains frost/freeze information for over 3000 U.S.
locations. The information is presented as a table, listed in
alphabetical order by state and then selected towns within each
state.
Be aware that this information is based on 29 years of data
gathering from 1951 to 1980, and that they are statistical in
nature and cannot unequivocally predict exact dates for any
given locality in any given year.
Biodynamics and Phenology use astrological and natural
occurrences to discern clues about the best time to plant and
harvest vegetables. Native Americans and other earlier
civilizations used similar techniques.
Most areas consist of microclimates that vary by elevation,
exposure and proximity to large bodies of water. The
Freeze/Frost Tables are a good reference point, but it makes
sense to keep track of temperature and other factors in your
particular vegetable garden location if you want to truly
understand when it is actually the best time to plant
vegetables.
To View or download The Frost Freeze tables; click on the link
below.
http://lwf.ncdc.noaa.gov/oa/documentlibrary/freezefrost/freezefrost.pdf
About the Author
Chip Phelan, a contributing editor for Organic Gardening
Review, is an organic gardener living in Rhode Island. Organic
Gardening Review is a resource center for organic gardening
enthusiast. Find us on the web:
http://www.organic-gardening-review.com
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