We have 3-4 year old seedlings of Borneo forest durio (graveolens, oxleyanus, dulcis, lowianus - two of each) in our small backyard garden. We are considering getting more land, and in that case I would like to plant these in a bit bigger scale.
Are the other durio graft compatible with zibethinus (durian baan) rootstock? Searching the forum the only related result was fruitlovers saying in 2015 that graveolens should be compatible with zibethinus, but maybe someone on the forum has practical experience of successes/failures already?
Also, what would be the best case flowering scenario for trees grafted with scions from 3-4 old seedlings? I assume it would be slower than scions from already fruiting trees, but might still be faster than planting seed? For example, according to info on theferns, for example graveolens from seed might flower in 6 years.