Daniel; Buy some Epsom salts and when your tomatoes are about 8” high sprinkle 1 tablespoon around them. Epsom salt is magnesium sulfate. Magnesium is needed to create Chlorophyll needed for your plant to grow. This should speed up growth. Do it again at 16 inches 4 weeks after that. See the link that Diana provided for fertilizer.
Thanks. Like this: (8lb), Scent Free $6.64 https://www.walmart.com/ip/Equate-Epsom-Salt-Magnesium-Sulfate-128oz-8lb-Scent-Free/690032288?athbdg=L1200&from=/search
You could also get some digested kelp that might speed up growth.Like https://www.walmart.com/ip/Dr-Earth-Organic-Natural-Premium-Kelp-Meal-Plant-Food-1-0-5-2-Fertilizer-2-lb/38440121?from=/search
Yes exactly. Epsom salts are cheap and you can find lots of you tube videos on using them. Also check Diana’s link. Your choice for the kelp, but it should be cheaper for you in MA than me in KS. (Shipping!)