I bought a small basil plant from local supermarket about 18 months ago and I used to keep it indoor. About 15 months ago I went out of town for a week and the person who was going to water the plants never did and 50% of the basil plants died. I decided to transplant the remaining plant to a larger pot and make sure I took care of it. Some of the plants had turned brown on the bottom but still grew and were green on the top. I decided place the pot outside and it grew bigger and for the first time I saw flowers but still the stems on the bottom stayed brown. Most recently I have noticed that in one of the plants the leaves are turning or growing yellow, this is not the case on the other plants. All of them seem to have the brown bottom.
When they are outside I don't water them since they seem to have all the water they need. We are about to start fall so I am going to bring them inside soon. I was hoping it would propagate more and although it has grown in height I havenâ€™t seen much dense growth.
Can anyone give me a possible reason why the trunk or bottom stem is brown? I might have watered it too much about a year ago after I came back and saw that it wasnâ€™t watered for a whole week.
Is the plant rotting? How can I grow more plants, I heard that you can grow another plant with a 6 inch cutling but I am afraid it wonâ€™t grow