Right now the fruit is very sour, but refreshing, I am going to wait until the fall, see if the fruit ripens any sweeter, and if not, regraft it. It's a fairly old tree at 10+ years, and don't want to completely destroy it since it produces so much. I think it's white pomello but it's not very sweet yet. anyone grown Pomello? My initial other thought was giant Key lime.. until they got so big.

You're very welcome Ghazal :) Its great that you've noticed it does better with more light, always trust your instinct as the generic advice online is hard to apply to so many different scenarios. Calatheas don't do well in direct sunlight as it can scorch the leaves, but in a north-west facing window it will largely receive indirect light and a small amount of weak sunlight when the sun is setting, so putting it next to the window should be great for it. As a tip for working out what is "bright, indirect light" try and find a place where your hand casts a fairly strong shadow, or where you can easily read a book without needing a light on. Direct sunlight is when the rays hit the plant. In terms of increasing humidity, theres a few things. You can add a little water to the pebble tray but do not let it reach the bottom of the pot as you don't want the roots to be sitting in water. As the water evaporates, it creates humidity. Buying a humidifer is another option if you want to, although probably not necessary until winter. Or placing it in or near the bathroom or kitchen where it will get some steam if that's an option. Grouping plants together if you have others always helps to increase humidity. Hope that helps! Also, in case you aren't aware - Calatheas are fussy about the minerals in tap water if you have hard water in your area. It's best to use distilled or rain water where possible, although I can't see any evidence of your plant not being happy with the water. Hope you notice an improvement soon and do post an update if you remember, I'd love to see how you get on!

That shouldn't be the case (old growth dies as new emerges), the net result should be 'Growth', not equilibrium. Perhaps in your case, Blue, they need micronutrients and are recycling.

I’m not sure if you posted a pic, I couldn’t see one buttttt. You’re in a desert and citrus trees need a lot of sun and water. You’re not in it’s ideal living situation. It’s most likely that it’s getting too much sun and not enough water. I live in Florida and we had an issue with ours not producing lemons. Our lawn company told us to basically drown it and the shake the crap out if it and beat the branches with a broom. This might sound like a joke but this stimulates a hurricane/wind which causes the tree to go into fight or flight mode. Ultimately giving it the urge to hunker down and reproduce.