Water Droplets on Leaves

Colorado State Univ. Field Day

As I was learning to garden, I repeatedly heard the “experts” telling us not to water in the middle of the day. The prevailing wisdom was that any water droplets on the foliate would act as little magnifying glasses, burning tender leaves. (Think of using a magnifying glass to start a campfire, and you get the idea.)

Then, we all learned that this was a gardening myth. Water droplets are too close to the plant tissue for sunlight to focus on the leaf and cause any damage.

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Garden Advice: More Misconceptions

Here are three more cases where the standard gardening advice won’t do your plants any favors. (If you missed my previous posts on this topic, try typing “garden advice” into the search box at the top right of this page.)

B1 container-001Vitamin B1 stimulates root growth. No, it doesn’t. A study done in the 1930s showed that when disembodied pea roots were placed in a petri dish saturated with vitamin B1 (thiamine), they grew. From this, they concluded that pouring a vitamin B1 solution over newly transplanted plants would help them get established. However, the plants in your garden are not detached pea roots, and they’re not growing in a petri dish. Further research has shown that adding B1 does nothing to help reduce transplant shock, but it will have an effect on your wallet. If you want to encourage roots, look for a product containing a rooting hormone instead.

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