I run a similar mix of soil. I get usually maybe one month tops outta a gallon n half of soil. And that's with newly rooted clones. They will certainly fill that up with proper lighting, and I run mammoth P also. Which some peeps might disagree with. But I just stick wi what works for my grow styles.How long should I veg in a 1.75 gallon pot? I’m going in a soil mix of happy frog and roots organic