Q.Preventive care and management of heirloom tomatoes
This may be to broad of a topic but any information appreciated.I want to developing a weekly by week care and prevention schedule for growing heirloom tomatoes.Preventive care, fertilization, foliar spray/feeding, a best care guide.Let’s see if we can put one together.

No problem these links will answer all of your questions!
https://www.gardeningknowhow.com/edible/vegetables/tomato/heirloom-tomato-varieties.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-guide.htm