My cherry tomato plant in the 5-gallon bucket looked sad and yellow all spring. A neighbor in my apartment building, who grows amazing peppers, pointed out my soil was still wet days after watering. I was giving them a full cup every morning, thinking more water meant more fruit. Now I'm letting the top inch dry out completely. How do you guys check if your containers actually need water?
Oh man, I feel your pain. I did the exact same thing with my first pepper plant. Thought I was being a good plant parent and drowned the poor thing. What finally clicked for me was lifting the pot. A dry pot is way lighter than a wet one. So now I just heft the bucket before I even think about the hose. Also, I started using those cheap wood skewers you get at the grocery store. Stick one in the soil, if it comes out damp, I walk away. It sounds silly but it's saved so many plants.
Oh man, "soil was still wet days after watering" is the biggest clue. I killed a basil plant the same way. The finger test is my go to now, just stick it in an inch deep.
Wait, you killed a basil plant from overwatering too? I thought those things were supposed to be thirsty. Mine just gave up and turned into a sad, soggy stick. The finger test is a lifesaver, honestly. I feel like a plant detective now, poking around in the dirt before I even think about the watering can.