Austrocylindropuntia grafting

[Shane]

I've been experimenting with using Austrocylindropuntia (subulata) as a stock. My first graft (M. gracilis) fused then dried out a short time later (humidity and a good amount of pressure). My second try (chlorophyll lacking Gymno) did not fuse (humidity and no pressure). This is the third try, just unwrapped after a week. I did humidity and light pressure

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I put it outside under a bush. Hope it takes. Fingers crossed

[Pereskiopsisdotcom]

This is the non monstrose variety you're grafting too? Why is there what appears to be yellowing staining on the top of the exposed rootstock?

[Shane]

This is the non monstrose variety you're grafting too? Why is there what appears to be yellowing staining on the top of the exposed rootstock?

It's normal, non-monstrose Austrocylindropuntia

As for the orange patches, I'm not sure. It's shown up in all my Austrocylindropuntia grafts kept in humidity. It doesn't appear in cut surfaces that were allowed to dry normally (no humidity). I did some experiments rooting cacti in water last year and the bottoms of the plant turned orange with no damage to the plant. Maybe it's just something that happens when cut surfaces of some cacti are kept moist