How long will a tomato plant keep growing

[ArthurDent004]

I started a tomato plant from seed called Early Wonder from Tomatofest - https://store.tomatofest.com/Early_Wonder_p/tf-0157.htm

It has been growing for 2 years and 4 months in a container in my master bedroom closet under an LED grow light. I just harvested 14 tomatoes this last Sunday.

It's growing in a 5 gallon SWC. I top water every 6 to 8 days, adding a gallon of water each time. I used to water more frequently, every two or three days, so there was always water in the reservoir but discovered that waiting till the reservoir was almost dry produced better results. I use the Texas Tomato Food on a schedule of three feeding and then three watering.

My question is how long will this plant keep producing. Since this variety is listed as a determinate I would have thought it would have shut down long ago. I keep pruning to keep the plant compact for my grow space and then new growth and flowers sprout a couple of weeks latter.