Rewetting Hydrophobic bark
I have a citron in a 10-gallon container with 5-1-1 mix which has drought symptoms and yellow vein chlorosis. Turns out that mix is completely dry below the surface. What's a good way to re-wet the mix that does not use a large amount of water? Would mixing a few drops of soap into the water be okay, and if so, what type of soap should I use? Are there any other agents?