Is Star Fruit worth growing?
Star Fruit is expensive up front, but its multi-harvest trait is the reason to consider it. You pay for the seed once and can collect more fruit from the same plant, so judging it from a single unmutated harvest understates its long-term use.
Buy it when you can afford the 315 million reported price without blocking your other upgrades. Give it permanent plot space if you regularly play long enough to collect repeated harvests, and use size or mutation bonuses on it when those bonuses would otherwise go to a lower-value crop.
The reported 6,000-Sheckle average fruit value is community data, not guaranteed profit. Check the live shop card and sell preview because balance patches, fruit weight, and mutations can change the result.