Thank you to everyone who replied to my original challenge post that got buried in feedback

All of your comments were much appreciated!
I tried the challenge again, and for some reason when I started another save I was able to collect all of the seeds quickly and get my forbidden fruit seed to plant (do I need to grow the plant to perfection before the challenge is over or is it okay to leave it as a sapling and return to growing it after the challenge is over?)
Anyway, my main question is regarding the seeds. If I recollect each of the seed types, would I be able to access the seed stump and sell the seeds in my sim's store without cheats and sell them in a store after the challenge is over? I wasted a LOT of time last year collecting fertilizer from JH only to find that when my game updated (I collected them every day)--all of my fertilizer was gone! I don't want to do this challenge again if I can't keep and resell the seeds for other sims, so if anyone has an idea please let me know. Thanks!
Comments
As for the magic beans... I still have extra skulls in my inventories and laying about my houses for decor. So I'm assuming the beans will be like the skulls and not disappear. I think the fertilizer was something a little different from the day of the dead challenge and this current challenge. Hope I helped good luck.
I still had fertilizer left and couldn't sell it or do anything with it so I'm going to say I doubt you can do either thing once the challenge is over. I assume if you haven't become a plantSim by now, it may be too late when it ends. Also, I doubt you can sell the seeds (unless they allow that on the flea market table) in a store. I have run out of time, too, since I haven't played and last time I only had one seed. lol