Har, thank you for knowledge. You're the reason i have calcium sulfate after watching a fertilizer video, stating how well it prevents leaf tip burn when fertilizing, i tried it, it worked.
This morning i gave entire tree a shower with 2oz UltraRx 1.5 tablespoon/gallon. Used a little on grapefruit too.
Then i got out calcium & spread maybe 4lbs, and a few lbs of fert, and finally hosed it all in till saturation in hopes of dispersing it all evenly to soak in.
I'll water it again when soil looks dry. I know the fertilizer's on me if i did it when i shouldn't.
Trunk's 12" or more, tree maybe 12' tall. I cut feet off every yr.
Ed
Edit- removed photos of fert & spray because it didn't help drop problem, did make leaves healthier looking.
Fruit that dropped after sitting in sun on patio for days were rotten badly inside. My guess they dropped from mbbs or anthracnose or some type of bacteria. I'll be looking into systemic treatment. Large healthy fruit looking good on tree atm.