The strain is only really guarenteed to produce hash if its IBL, inbred line. Within a 10 pack seeds. Maybe even 5 which is crazy. Otherwise its just a cross where one or both the parents produce hash and the offspring will show a wide range of expressions. Like thousands.
Like a bell curve on a graph. From producing barely any worhy to producing more than usual like unicorn status. And all inbetween. It has to be selected for the specific extraction proceedure in mind tho like bubble hash, BHO, flower rosin..
Sometimes one can be fit for more than one but its not a guarentee. Just because its good for bubble hash doesnt mean its good for hash rosin. It could be great for flower rosin but horrible for bubble hash. Sound confusing? because it is, the extract scene is still very new and developing. So they need to be specific.
They really should tell you this so you buy more dedicated purchases like 30 seeds or more. Then again some people like variety just expect hit or miss results. Because its random like a lotty expect some to be like us, stuck with subpar results and some with only good results and everything in between.
Inbreeding like a IBL you can actually expect what you paid for. Otherwise its a gamble, something backcrossed 3x could narrow it down to 100 phenos. Thats the process of inbreeding. To get to 99% chance per pheno. Im after specific things like flower rosin but Ive gotten good smoke but looked funny. A couple phenos same strain one better than the other but both smoke and smell good.
Thats why its good to grow out as many as you can of same strain at once. You see much more of what it can offer. I wonder if they all shoud smoke good tho as Ive grown 2 phenos one strain. Both smooth and smell great.