Phosphorus deficiency & flushing

[Cat]

I've 2 x Northern Lights autos, 6 & 8wks old and growing in coco/perlite/canvas pots. They've been showing signs of phosphorus deficiency... I think... This might be due to not feeding enough nutes throughout their lives. Up until 10-14days ago, I only fed them 3ml calmag and 3ml Floranova bloom per 1 gallon of water. I've now increased the feed to 5ml calmag and 5ml bloom. This is a pic of one of the leaves that's gradually degenerated over the last few weeks and there are another handful of leaves starting to show early signs

Any thoughts would be appreciated.

I've been watering with 20-30% run off every day. Ph going in is 5.8 and coming out 6.0 or 6.1. I've spent too much money on my tent lately and can't really afford a decent soil tester for the next few weeks, so need to work with what I've got.

If I flush these plants, how much water per plant should I flush with? How long before I should expect to see any improvement?

 

[namvet25]

Can you post a picture of the entire plant please.

 

[Waira]

:smoking: hey Cat-- sure looks suspect, and the feed has been rather light,... yeah, a whole plant pic please to help with diagnosis,... don't flush, no need, and there's a different protocol for doing this in coco, so as to not FUBAAR the CEC ion balance in there with Ca, Mg and K,...

 

[Cat]

:smoking: hey Cat-- sure looks suspect, and the feed has been rather light,... yeah, a whole plant pic please to help with diagnosis,... don't flush, no need, and there's a different protocol for doing this in coco, so as to not FUBAAR the CEC ion balance in there with Ca, Mg and K,...

Yer, when I say flush, I mean rinse through with lower nutes. My pc cam isn't good enough for full plant pic, but I've been doing research today, so think I'm good...for now. Thanks

 

[Cat]

Can you post a picture of the entire plant please.

The pc cam isn't good enough for full plant pics, but I think I'm ok for now. Many thanks