I have a basil plant that is 2 years old. It goes to seed, then it looks dead, then it comes back to life. It keeps doing that over and over. We have no cold weather in Arizona that will kill the plant. About a month ago it went to seed for about the 3rd time. All the leaves fell off and now it is growing nice green leaves again. This is the same plant not a new plant from fallen seeds. Very interesting.
I never saw this happen in Tennessee cold weather always killed my plant.