Ha! Well I'm always trying to guess especially as we get closer to harvest. But I have found, pick a minimum that I'm happy with. If I get more than that, awesome. Sucks to go, man I only got 2 pounds off that plant......... then be like sweet I got 2 pounds! Stressful in those last couple weeks. I decided that 1 pound average would still be ok for me (really though should be 3 lb minimum). I have seen giants crumble within days, rain come in and not leave, even seen the po po ripping em down. Eggs and chickens and all.