Many gardeners in the Pikes Peak area have been complaining of undersized tomato plants, underperforming basil, wimpy peppers, etc. As usual, weather challenges us when we garden here, and this year, we have a rather unusual combination – chilly temperatures and (at times) over-abundant moisture. The last few summers have been warmer than average, so we’ve been caught off guard by conditions that are pretty comfortable for the gardener, but not so much for the warm-season vegetables and herbs!
A fellow Colorado gardener that I know of who gardens (with wild success) above 8000 ft always says “A tomato never wants to go below fifty degrees in its life – maybe even sixty!” (She, of course, uses cold frames, hoop houses, green houses, etc for all her gardening. To learn more about her garden, visit her web site here: www.pennandcordsgarden.com.) I suspect that the minimum-temperature rule for peppers is even ten degrees warmer than for tomatoes.
So, what’s the big deal? We’ve been over sixty degrees since the middle of June, right? Well, we have been for day time highs. But you have to also consider night-time temperatures. Even at the lower altitudes, night-time temperatures in our region dipped below fifty degrees several times in the past few weeks. This has helped keep our houses cooler, but it has definitely affected those hot-weather loving plants like peppers, tomatoes, and basil.