Welcome to the Bunnings Workshop community @Oldgolfer. It's brilliant to have you join us, and many thanks for your question about eggplants.
There area fewreasons why your eggplants could be yellowing. The first is that if this is predominantly the larger fruit turning yellow, they could be beyond ripe. The next stage after purple, the unripe fruit, is the fruit ripening and turning yellow then brown. You mentioned that they were purple. Did you tryharvesting them then? Once they've already begun to turnyellow, they are rather inedible due to thefibrous nature of their flesh.
Sunburn is another reason why the fruit will turn yellow. It's been pretty hot in Melbourne recently, and the tender flesh on young fruits quickly burns. When it burns it can turn yellow in patches or all over.
There are yellow varieties of eggplant out there; I presume you know what variety you have though.
They're the main reasons for yellow eggplants. I'm keen to know if you harvestedany when they turned purple.
Mitchell
