Herbs you use frequently either fresh or dry are definitely worth growing and harvesting for their excellent-quality essential oils and economy. With even only a small space for growing and then harvesting in a timely manner, you can get several or more harvests per growing season that will provide many times the quantity that would cost $5-10 each time if purchased - to say nothing of actually using that quantity of herbs in a greater variety of culinary and aromatic uses than you would if you had to spend the money!
We use a lot of herbs in salads, soups, stews, sauces, and other combinations – just about everything I cook starts with my homegrown garlic, leeks, parsley and cilantro; from there, additions include my basil, oregano, marjoram, rosemary, sage, savory and thyme.
Harvesting for Fresh Use
For parsley and cilantro, I harvest a batch an inch in diameter twice a week for fresh use, cutting swaths an inch above the growing point with a paring knife. When cutting, I try to gather all the stems close by so I don’t leave any stragglers to yellow and die by the time I recut that batch when they’ve resprouted several weeks later. I hold the stems together with a thick rubber band. I swish the rubber-banded batches in a basin of water to rinse the leaves of dust, and refrigerate in ziplock bags. To use, I just chop the amount I need - usually at least half of the bunch. I did say we used a lot, since we always have more waiting to be harvested!
For fresh basil, I nip off with my fingernail the individual leaves that are succulent and bright green. Older leaves I allow to remain on the bush to continue their photosynthesis for continued plant development. I encourage branching by nipping out the center stem at each node, which results in two more new tiny leaf clusters. Repeating this at each node keeps the bush short and full of new succulent foliage. If any flowers begin to develop, I remove them immediately at their bases to redirect energy into more foliage growth.
Harvesting and Drying and Storing
For herbs I’ll dry, like marjoram, oregano, rosemary, sage, savory and thyme, I cut individual stems while they’re still growing straight up and have only young succulent leaves.
After I’ve cut the straight stems, I trim back any lower remaining growth just to provide an uncluttered and uncurly base for future straight-stem growth. Be careful, however, to not cut lower than the bottom-most green leaves, as doing so may result in that branch dying back.
As you gather the cut stems together, be sure to keep them all facing in the same direction – stem ends together, and tips together.
After sloshing the straight stems in a dishwashing-size-pan of water to remove ambient dust, I arrange individual stems close together but not overlapping on a cake-drying rack.
Cutting them when they were straight avoids curly stems that make removing their tiny leaves difficult without crushing them and releasing their essential oils. As they dry, too-close stems’ leaves may “stick” to others nearby, and I want to be able to retrieve each stem separately in order to remove the oil-containing leaves whole and uncrushed. You want the essential oils to remain within the dried leaves until you crush them as you add them to your food, not before!
I place the rack onto a cookie sheet and then into my oven, which has a pilot light that provides sufficient low heat to dry the leaves overnight. When the leaves crumble and the stems snap, they’re completely dry. If the least wiggle is still apparent, more drying is necessary.
To remove the oil-bearing leaves from the stems, grasp one stem at its base, and use the thumb and first finger of your other hand to pull down the stem to its tip so the leaves fall into a bowl. Try not to crush the leaves, just remove them from their stems.
Put the woody stems into another container for the compost pile. For really sturdy stems like rosemary, which also contain the essential oils, save for use as skewers for your next shish kebab!
To dry basil’s larger and more tender leaves, I gently rinse the individual leaves I’ve harvested and then spread them in a single layer onto the cake rack so they don’t touch. When dry, I gently transfer them into a ziplock bag, trying to not crush the leaves as I press out as much air as possible.
Store dried herbs in their ziplock bags in a dark, coolish place. While general culinary advice is to replace dried herbs after six months, but I expect that homegrown and properly stored herbs will retain their vitality longer. Test by crushing and smelling and tasting – if it smells and tastes like dust, it’s lost its essence! But hopefully this isn’t before you’re already growing and harvesting more of those wonderful herbs!