I've been playing around with the idea of concocting an all-purpose spray of natural insect repellents to keep most insect pests from plants, particularly young ones.
So far, all I've got on my list are garlic, marigold, and orange oil, which is also an insecticide but the spray wouldn't be used to kill insects, just to repel them.
So far, my "repellent concoction" includes garlic and orange oil, all I've got this year to start. I'll add marigolds to it when they've started blooming. I've been lightly spraying the stems of plants that are suffering some insect damage, though a brew can be sprayed on one leaf and in a couple of days inspected for damage to check its safety for a leaf-spray, too.
What can you add to the list? Just natural repellents, not insecticides.