Nice shape , maybe a bit thin so I would say maybe 1/4 to 1/2 lb if you can keep from cutting samples on a regular basis. Next time try a high N nute ( I like Miracle Grow all purpose ) until you see flowers starting then switch to Miracle Bloom till finish and I think you'll get a bit fuller plant , also a tip.. More soil the Better.. While they do good in 5 gal bucket..they do Much better in a 25 gal planter... Just my two cents... Paul