Athosanswered grow question 6 years ago My 3 gal pot lasts me 7 to 8 weeks without needing any aditional nutes; a 7 gal pot should allow you much more time. If you add any nute, you WILL burn them, why? because of the high temperature, your plants drink A LOT more water than normal along with whatever nutrient you add, which will make the plant uptake more nutes than it would normally, burning it badly. Getting those temperatures under control is 100 times more important than giving nutes that it does not need.