I’ve tried many times over the years to grow cempedak here. The in ground seedlings would never make it past a few feet tall, always struggling in the winters, and eventually failing. That was with some real attempts at cold protection, plenty of foliage spray, chelated iron, etc. Reasons for failure probably are multifactorial, but I think ultimately the weather and the soil are the main issues.
I have a good size Cheena tree (20ft) as a side note, which is a great tree and a really nice fruit …
Anyway, back to the point. In 2019 I purchased some Chempedak seeds from Han Sen in Borneo. I then planted in the same “hole” Chempedak and Jackfruit (Amber and Excalibur Red) seeds. When the little seedlings were about 18” tall, I inarch grafted a few of the seedlings together. The idea was to allow the cempedak seedlings to share the power of the root system and canopy of a jackfruit trees.
Fast forward to 2024, and I noticed one of the fruits on one of the trunk portions of the multigraft bunch looked 100% Chempedak. It is actually a small portion of one of the “trunks”. Just a contributor from the roots up to about 18” high on the trunk and no participation in the foliage or canopy. Kind of hard to describe or visualize - will add a photo to illustrate …
The fruit was really fantastic, I would say my favorite artocarpus that I’ve tasted. I am brainstorming ideas on how to get the Chempedak portion of this trunk to continue grow, take over, or increase its fruiting. One is not enough !!