Sounds excellent. My tomatoes, peppers and chiles aren't quite that advanced, but if I can set up some sort of solar-powered grow light system then I might well do that in the future. Sadly I don't have any first early potatoes this year as my wife really likes Jersey Royals and I wasn't able to get any of the seed potatoes (International Kidney) from which they're grown. I read somewhere that there was a poor crop last year which has restricted availability (sounds possible -- a local farmer was telling me a few days back that he'd been offered £20,000/tonne for some variety of potato that had failed badly last year when he had a few acres that were still ok).
Sounds like sweet potatoes do well for you. I've considered growing them in the past as we eat a fair few, but I've heard that they can be a bit unreliable and need quite a bit of space so I've shied away from trying them.
Our quince is just coming into leaf, too. It has suffered for a few years from the leaves turning brown and falling off in the middle of the summer though. I think I might have to resort to spraying with Bordeaux Mixture this year to try to control the problem.
We're down to our last few butternut squashes and our last few garlic bulbs, too. I think I harvested about four dozen garlic bulbs last year and we have only eleven left, so I'm not sure they'll last until the next harvest.
Interesting that you have water cress. We have it growing wild here, but I vaguely recall reading that there's some issue with eggs of some pest or other (snail? slug?) that aren't good for humans to consume and I've never been able to remember enough of the details to be able to check it properly otherwise we'd certainly eat that.
James