Tangelo has changed back to Mandarin, this was a topic on another forum www.daleysfruit.com.au/forum/tangelo-has-changed-back-to-mandarin/ It seems unusual to me, it does look like a tangelo, not any Australian rootstock. For the age of the tree, 30 years, planted in 1990, its unlikely to be a historic rootstock var like a mandarin or orange rootstock. It doesn't seem that the rootstock has taken over ?? The main Tangelos in Australia back then were Minneola, Seminole and Orlando. Don't think any other types were around then. Anybody got any thoughts on a major shift in fruit characters, not just a limb or branch mutation ??
Yes, it is actually multi-cropping. It always used to bud-burst early spring, but now it can crop new buds after good rain in warm weather. So it is possible to have green fruit, half ripe fruit and fruit almost ready to eat at the same time.
Overall, I rate the fruit now a 9/10. Hardly any seeds and sweet enough for good eating. Before it was more a 6/10 due to the many seeds and tart taste.