Huge tomatoes this year

Gardening/ planting became a new hobby, this year. Built a 4' x 8' planter box. Planted two 4 $ dollar K mart tomato plants, carrots & radishes... The two tomato plants took off, within 90 days , took over the whole planter box. Every relative had multiple tomatoes delivered weekly, plus the family take. Finally pulled the plant roots , two weeks ago ( getting acidic tasting)... Was a hoot.