Stacking

Hi what’s the best nutrient to use for stacking my fruit, I’m using G-10 and snow storm by Humboldt County but it’s not working I usually have about 4 to 5 tops per pot but I can’t get more than 1.3 ozs per plant ..I’m useing a 3 gallon pot and I veg for about 35 days

this girl is 65 days coming down today as you can see the top aren that big I’ll probably get a little over an oz