[onetimemanytime]

You don't need seeds to propagate grapes. Cuttings will almost always root. Or you can graft in an existing rootstock.

[cmrdporcupine]

There won't be any viable dormant hardwood with buds on a cluster like this in the grocery store. You'd need to do tissue culture. Which involves labratory equipment, a pile of chemicals, and a totally sterile environment.

[Scoundreller]

Maybe it’s harder for plants, but people do cell cultures at home and cultivate them into “fruits” all the time in mycology. Including plates, filtered laminar(ish) air flow and sterilization.

Dealing with plant cells seems a lot easier because you don’t have to conmpete with spores floating all around.

You could buy a certified clean room that’s inspected for $20k. Or build your own for a few hundred bucks.

[cmrdporcupine]

Sure, but you could also probably just buy a licensed potted vine of this from a nursery for like $20. :-)