What's the one crop you always second-guess your fertilizer dose on?

Hey everyone! I'm Ahmed, maker of Fertilizer Dose.

We built it because guessing fertilizer amounts is expensive — too much wastes money and harms the soil, too little hurts the yield. It gives exact NPK doses per acre for 31 crops plus vegetables, with planting calendars and a plant doctor. Free, no signup, 19 languages including Urdu.

Curious: what's the one crop where you always second-guess how much fertilizer to use? For me it was always tomatoes — the numbers change by growth stage and region.

Tell me yours, and I'll check what our data says.