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When to Plant Iceberg lettuce in Glenwood Springs, CO

One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Glenwood Springs can be reffered to in order to determine when it's a good idea to plant iceberg lettuce.

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Planting Calendar for Iceberg lettuce

Frost tolerance for iceberg lettuce: Tolerant of a very small amount of frost.
When to plant: Up to 3 weeks before last frost.

Since iceberg lettuce are barely cold tolerant you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant iceberg lettuce
Possibly ok, but a risky time to plant iceberg lettuce
Probably not a good time to plant iceberg lettuce

The earliest that you can plant iceberg lettuce in Glenwood Springs is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant iceberg lettuce and expect a good harvest is probably August. Any later than that and your iceberg lettuce may not have a chance to grow to maturity. You can get started a little bit earlier by starting your iceberg lettuce indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Glenwood Springs. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Glenwood Springs is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Glenwood Springs you get surprised by a frost after April 15 be ready to cover your iceberg lettuce if you have a surprise late frost.

USDA Zone Info for Glenwood Springs

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-10°F
Highest Expected Low-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Glenwood Springs

You may be interested in your other planting guides for Glenwood Springs.