My basil is extremely tall (ladies arm length high) and with a recent lack of rain and water restrictions, it's just dropped all but its very crest of leaves (half pinched flowered approx 3 weeks ago). How far back can I prune it without killing it entirely?
Since basil is a rapid grower you can be quite aggressive in cutting it back. According to the article below you can "cut the herb back about ΒΌ inch above a node, 3 inches from the base of the plant. Leave a few inches of leaves on the plant after pruning."
You can read more here:
https://www.gardeningknowhow.com/edible/herbs/basil/pruning-back-basil-plants.htm
I have a small plant. How often do I give it water and how much and what time of day?
Here is an article that will help you.
https://www.gardeningknowhow.com/edible/herbs/basil/basil-watering-tips.htm
Mixing basil and bay leaf plant together outdoors. Is it ok?
Basil and Bay Leaf are two of the best choices for a classic French Herb Garden, they can absolutely be planted together. There a couple of things you need to be aware of, like the fact that Basil will die off at the first frost. This article may help you: https://www.gardeningknowhow.com/edible/herbs/hgen/french-herb-garden-design.htm
My basil keeps developing this leaf rot. I am using an aerogarden. Can you tell me what this is and how do I get rid of it? Before planting I washed everything in acetic acid solution and then rinsed thoroughly. I am using distilled, deionized water with miracle grow liquid plant food weekly. Thank you for your help, Kenn Scheinberg.
This looks like Basil Leaf Spot.
https://www.gardeningknowhow.com/edible/herbs/basil/basil-diseases.htm
How do I treat the little pests on the underside of my basil leaves? Can I use rubbing alcohol and water spray? Middle coastal Florida...zone 9, I think.
Try a strong spray of water first. If that doesn't work after a day or so, add a little soap to the water and try again
I have a regular basil plant. This plant is growing similar it. The leaves are darker on this and a few larger leaves.
All of a sudden my basil (sweet basil) plants wilt and shrivel, starting from the top. No bugs anywhere, at least not on leaves. Soil is fresh from large bags. Problem is only in one container. I grow the basil on the roof in NYC and gets good sun, water. Had just put in agri-fos, a safe fungicide and never any trouble before. Other pots have same mulch, soil, water, agr-fos, etc but are healthy. Normally, fungus would take a while to affect plants. Stem turns brown and plant slowly dies. This is first time the plant quickly wilted without any signs. Wilting starts at upper leaves and droop over, stem curves down. Bottom leaves healthy but soon wilt. Only one section of one pot has trouble so far. All other plants are fine. I gave all the plants another agri-fos spray. I also sprayed when there was no problem, which should have prevented any fungus. So this is a mystery. When I pulled a wilting plant up, the main root was nice and long. Didn't see any bugs. thanks louis
Fusarium Wilt is a common issue with Basil plants.
These articles will help you pinpoint the cause.
https://www.gardeningknowhow.com/edible/herbs/basil/basil-diseases.htm
https://www.gardeningknowhow.com/edible/herbs/basil/fix-droopy-basil-plants.htm