|CSU Dept. of Atmospheric Science image|
With the sun shining, birds chirping and moisture in the ground this year, many of us are eager to jump into the garden. There are several good things to think about before you just go ahead and plant. Living in the mountains can have its challenges. Did you know for every 400’ higher in elevation that you lose the number of growing days? However, other factors can determine your frost-free days. When I lived in Silverthorne CO, 8730’, we had many cold mornings. Silverthorne is in the Valley with the Blue River running thru town. Cold air sinks and follows rivers. Leadville’s elevation, which is 10,151’ but is a high flat area where cold can drain off to lower elevations.
I now live in Fruita and since it is lower in the Valley, it can be a good 10 degrees colder than Palisade. This is why most of the fruit and vineyards are in Palisade and why crops like hay and wheat and some vegetables are further down the valley. Fruita can have a 32-degree frost around Mother’s Day where Palisade can have its last frost date 3 weeks earlier.
For mountain gardens, cool season vegetables are your best bet. Leafy greens like lettuce, kale and spinach work well. Broccoli, Brussel sprouts, cauliflowers and many root crops like beets and onions are also great cool season crops. So why aren’t warm season crops like tomatoes, peppers and squash a good choice? Well, many of these warm season crops need night temperatures of at least 50 degrees and days up to 90 degrees Fahrenheit. Moreover, I am not just talking air temperature. These plants prefer soil temperatures of at least 60 degrees. Even at lower elevations, these plants are planted too early in the season will suffer from that cold stress and are prone to developing viruses and not thriving.
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This just shows a shorter season tomato variety.
Now I could have used other methods of season extension to grow my tomatoes as mentioned above. I did however grow many cool season crops like lettuce and spinach. Did you know years ago there were lettuce farms in Silverthorne? Sometimes it is much easier to grow what grows best in your area. Depends on how much time, effort and money you want to put into it. Happy Growing Season.