Many people have asked how do the roots form on rootstock. The basic’s are the same for any hardwood cuttings and there propagation.
Here we have a bundle callused rootstocks, just come out of the heated beds. Most are callused, with the odd few not taken, and a few with adventurious roots. The cuttings here are of various diameters ranging from 4mm to 10mm, makes no difference at this stage.
Another bundle has a few more even longer adventurious roots. I think these are ‘Colt’ rootstock, not normally propagated using hardwood cuttings. As they normally are grown in stool beds. But all cuttings here are approx the same diameter.
The above photo shows really nice callusing all around the circumference. You may just see very slight root formation near the centre of the RH photo.
This a plum rootstock, showing very slight callusing, but really nice root formation. Some roots forming from the base as well as from the sides.
Sometimes things do not go to plan. I think this adventurious root has got a mind of its own.
I am not too sure where this root thinks its going. Its growing vertical from the callus.