Need some P

Alright, I got a plant thats 6 weeks into flowering today, and is now showing phosphorus deficiency. Could somebody tell me a quick source of phosphorus thats organic. I know I could use fish bone meal or rock phosphate but I'm not sure they would break down quick enough to be absorbed before week 8 or 9.

The strain I'm talking about is papaya, first time growing it so I'm not real sure how long it'll go, looks like 3 more weeks. I am sure it is a phosphorus deficiency.

use an organic tom feed.

Theirs instant (small amounst) in liquid ones. No good me adviseing as i aint sure if your EU-USA or elsewhere

Biobizz bloom is stong in P (N 2 P 6 K 3.5)