Do nothing,
I grow over a 1000 tomato plants each year and 100 of them are beefsteaks. Beefsteaks are slow growing, and do not bare for about 90 to 100 days. I have had my beefsteaks in the dirt since April 1st and they are about 2 foot tall and wide. My early girls planted the same time are 6 feet tall and have tomatoes starting to turn red. keep the fertilizer to them (minus nitrogen) and you will be rewarded with many 2lb plus tomatoes.
“Do nothing,”
The advice I like most to get!