Desperate rooting!

[ElieEstephane]

After refusing to root for more than 5 months and shrinking to 25% its original size, my parodia warasii cutting rooted. After trying everything with no success, i put it in a moist clear plastic bag and put in the shade and here's the result! So many new roots! First i thought it was mould though.
I hope you find this helpful.

[rsales3]

Good job! and great patience.

[DWDogwood]

That's a cool idea.
So I've tried it, with a slight twist.
Took a plastic ice tea bottle cut in half and set a struggling rootless cut of a rare Espostoa in it. Have it resting on the little coned bottom, with just a few drops of water in the rim below. Made sure the plant was washed and mostly dry and sprayed for bugs.
Sealed the cut bottle with tape and put it in shade.
We'll see.
Your method is similar to my graft incubation method. I'll put a small potted mytillocactus stock with a scion held on with rubber bands into a ziplock bag to keep it moist for a few days.
About day 4-5, I'll unzip the bag to allow fresh air in. I have seen Mold start soon after that time frame, being very moist, so I worry about that potential issue. But I assume the cut is well healed over so that may not be so much an issue as fresh graft cuts. Even still furry stuff grows on the spines frequently in just a couple of days. It needs to be watched.
Consider me a control group test.

[ElieEstephane]

That's a cool idea.
So I've tried it, with a slight twist.
Took a plastic ice tea bottle cut in half and set a struggling rootless cut of a rare Espostoa in it. Have it resting on the little coned bottom, with just a few drops of water in the rim below. Made sure the plant was washed and mostly dry and sprayed for bugs.
Sealed the cut bottle with tape and put it in shade.
We'll see.
Your method is similar to my graft incubation method. I'll put a small potted mytillocactus stock with a scion held on with rubber bands into a ziplock bag to keep it moist for a few days.
About day 4-5, I'll unzip the bag to allow fresh air in. I have seen Mold start soon after that time frame, being very moist, so I worry about that potential issue. But I assume the cut is well healed over so that may not be so much an issue as fresh graft cuts. Even still furry stuff grows on the spines frequently in just a couple of days. It needs to be watched.
Consider me a control group test.

That's very cool!! Thanks for your input.