Yellowing leaves from the bottom up

[Rossta420]

Hey,Hey,Hey,

I am having a bit of an issue I am growing MAXI GOM. I am on day 50 and the breeder cals for 75 days. I am growing in an ebb and flow system using hydroton as my medium. All other stats are listed below. My problem is that I am getting yellowing leaves from the bottom up the problem isn't to severe but non the less still a problem I am wondering if anyone has any ideas or suggestions as to what it my be and also any solutions. I am a bit of a nube when it comes to autos I belive it is a nitrogen deficiency but other than that I am at a loss thanks for any help and advice you may be able to give me it is much apreciated

Ph:5.6
Temp 79
RH: 45-50
Water temp: 68
Nutrients: AN Sensi bloom a&b Ph perfect

The problem is only on the bottom leaves of a few plants

as you can see this is the bigging stages of what you see above
The bottom leaves compared to the upper leaves

As I said above any help/advice is greatly appreciated!

Cheers,
Rossta

 

[JM]

yup... nitrogen deficiency... increase your veg nutes a hair....

 

[mr.sessemia]

You should be giving full dose by 50 days - if not, time to increase.
Also as you get closer to the end of life/harvest time - the plants will yellow just as it is doing.
If it is really a 75day strain - then day 50 should have some yellowing starting to appear.

peep,...how he hits ya over the head with sum smooth common knowledge that makes you say well..............yeah that makes sense............and thats the type of ish thats makes him a SILVERBACK