Depends on how much its branched, and how big of a pot you have it in.
18-20 inches, not alot of branches, 30 grams dry or so, mostly on a big top bud.
If you have them branched out to 5-6 flowering tops, you could ecpect 60 to 80 grams dry.
This is from personal experience, as I grow widows in 8 inch soil containers.
I have tried both the main cola method with them, and branching or super cropping as well.
I found the cola method produces less bud, but more potent smoke, as branching produces a little more smoke, with a slight drop in potency.
I use only organic nutes.
I also found that super cropping, or branching or pruning the plants, also seems to reduce their flowering period by 2-3 weeks, they will about double in height. But allowing them to continue with a cola, and letting them gain height, they will double or triple in height during the flowering period, and it will go on for 8-10 weeks.
Widows are very adaptable, as they can be pruned to mimic an indica, or allowed to grow unchecked, like a sativa.
I can reccomend, during the last 4-5 days of flowering, give them NO light, and LITTLE water, keeping the soil almost dry. This will push out the last bit of the THC, and make a dramatic difference in flavor and potency, aroma too.
Oh, and good luck with the smell, if smell is an issue for you adress it NOW, widows STINK.
Heres a pic of three widows, unpruned, or maybe just tip pruned late, I dont remember, but you get the idea.
