Low N in coir/peat - advice wanted

[Rahz]

Problem solved. I am PHing feed to 6.5. I also started feeding mid week. Runoff is at 6.1.

Plants looking great halfway through flower. They would be yellowing pretty good at this point if I hadn't changed anything.

umoles in the 400-700 range is PPF. With LED this basically means they're the same. PPFD is PPF per square meter. If you are taking a measurement with a par meter and getting 800-1200 umols that is PPFD readings. Take grid readings and find the average will give you the average PPFD. 800-1200 spread, average is possibly around 950-1000.

If you know the lamp/s output in umols (PPF) you divide by your square footage and multiply by 10.7 (sq/ft in a sq/meter) to find the average PPFD. 18 sq/ft space for instance has a lamp that outputs 1480 umols. 1480 / 18 * 10.7 = 880 PPFD

 

[polishpollack]

So you're saying it was a lighting issue all along?

 

[Rahz]

So you're saying it was a lighting issue all along?

No the lighting comments were replying to Breedingbull's comment on PPFD.

The problem was either PH too low or not feeding enough or both.

 

[TheHarvester]

No the lighting comments were replying to Breedingbull's comment on PPFD.

The problem was either PH too low or not feeding enough or both.

Both for sure.

Peat based medias need to be amended with lime to buffer the low 3.5ish PH it has.