@paulinruskin maybe a tad less sun, and maybe your soil pH is too high? I'd try Black Kow composted manure as a top dressing too. That will help lower the pH. Fabric pots are tough to get to a low enough pH (5.5~6.5). They do better in ground in Florida.
I've fought chlorotic leaves too ..
its usually the pH being too high...pH meters help reading the pH of water from the pots. This was 7.1, and adjusted to 6.2