I think sometimes the reason why people don't grow herbs is because they don't know how to use them. When you bring home a rose bush, its easy. Herbs are different. Some of them do have pretty flowers like Yarrow, and Mints but many do not. They are grown often for their leaves or roots. Some herbs are difficult to process but Moringa leaves are easy.
Don't be afraid to pick the leaves. Moringa trees grow their branches back quickly. You want to use all of their nutritional bounty. Use the young leaves. If you have baby trees, grow at least 3 to 5 so you have enough leaves. Once they get big, you will be drying a lot of your leaves to keep up with the production. I would say that each family should be growing at least three trees or more. I use the leaves fresh in salads and to make fresh tea. I save the powder for the winter, when the trees will be dormant.
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Step #1: Take off a branch with healthy green leaves. Pick off any bad ones. You need to use your Moringa leaves when they are vibrant and green. If you have leaves that are older, use them in your worm compost boxes. I notice there are huge redworms living in my Moringa tree roots. When we had to move up here from California, I had 6 worm beds. I could only take three in the truck. When we arrived here and I was transplanting some small trees, there were more huge redworms in my tree roots then in the compost box. We had lost some of them in the compost boxes when it snowed at the old house. The Moringa trees had been protected in the greenhouse and the worms survived as well there.
Step #2: Wash them gently but completely in your sink. I just run the water over them, turning them to make sure both sides get washed. You need to wash your leaves because they may have dust and because of flies. You want clean product.
Step #3: Shake the water off the leaves and pat dry gently with a paper towel.
Step #4: If you have a gas stove, line the wire rack with a layer of paper towels, then lay the washed leaves on the wire in single layers. Don't pile them on the rack in thick layers. You want air circulation around them.
If you have an electric stove, turn it on to warm for a few minutes before you put the leaves in. Use a single layer of leaves so they don't mold. Again, air circulation is important.
You can also use a dehydrator as well. You don't even need to turn it on if it is an electric one. The leaves are thin, so dry very quickly.
Drying in the sun and shade subjects the plant material to bugs, flies, dirt, mold, and contamination. There is also a loss of nutrients if dried in the sun, by excessive heat , and other factors.