I have not experimented with this myself much, however have seen a few people try and fail with grafting, grafting has made it into the competitive growing world recently so I started working on ways to get better success at grafting and wrote this stuff on the subject. When this method is done correctly you can grow any strain as if it was big bud or money maker without having to cross it. Grafting is quite possibly the future of cannabis growing.
This seems to be a newer technic being used in competitive veggie grower yield competitions to enhance the nutrients...this technic could be used in breeding also in order to attach 5 or more different female strains onto 1 plant thus growing out 5 or more different strains in the space of just 1 plant thus increasing amount of crossed strains.
Basically you take a strain you like and graft it to the root system of a massive strain like big bud and thus you get big bud's entire growth genetics into a favorite strain of your choice without loosing qualities...would be great for creating a massive CBD plant.
First a video on how exactly to graft
Search on youiube for "How To: Graft Marijuana - Multiple Strains on a Single Cannabis Plant "
Search on youtube for "How to graft cucurbits"
Search on youtube for "How to Graft Greenhouse Tomatoes "
Now on to Grafting in order to turn nutrients into super steroids.
"the question of why one would want a 2,000 pound pumpkin gives way to an even better one: how does one make a 2000 pound pumpkin?
The pumpkins wear blankets. They get special nutrient-rich elixirs or experimental bacterial concoctions. Some growers even toy with other techniques, she says: grafting two vines onto a single plant in order to double the nutrients reaching the fruit.
Giant pumpkin growers are pushing and pushing, racing towards the limit of maximal pumpkin. Where they'll stop, nobody knows."
October 24, 2014
Award winning competitive yield grower Mark Clementz grafting watermellons in order to boost nutrients
Search on youtube for Mark Clementz'
"Grafting Watermelons" and "Watermelon grafting!" (two videos)
Here is link to the guinness book of world records proving the grafting technic really did grow the world's largest watermellon