Older leaves turning yellow - Not Nitrogen?

[Lifeandtimes]

Hi everyone

My grow is just over 4 weeks old,she is in plagron royal mix soil but she was in some standard indoor plant soil prior to transplanting at 2 weeks.

The bottom leaves have gotten yellow in colour and are starting to wither as in the pics.

I was told it was a nitrogen deficiency so I bought nutes and water with them every second which is every 2nd or 3rd day depending how dry the soil is.

She is under a 250 watt cfl bulb with an average room temp of 22 degrees Celsius. The water I use has a ph of 7 but the running of comes out around 6.2-6.5

Can anyone tell me what's going here? The rest of the leaves look healthy but the next oldest leaves are starting to fade in colour like the worst ones did

 

[TheFertilizer]

What kind of nutrient did you get and how much are you feeding it?

The fact that it happens to the lower, older leaves I'd indicative of something but I forget what, I will see if I can find my old deficiency charts.

 

[plumbcrazy]

Not an issue, use 1/4 to 1/2 strength nutes, their looking good their young your soil most likely has nutes in it just give them water for a couple waterings then introduce nutes gradually. They will be fine they are resiliant. Happy Dayz are coming your way, patience patience patience.

 

[SCROG IT]

Your plants look healthy. Like statement above soil has nutes in it already dont overfeed and they will continue to thrive. Lookin good. First set of leaves might just look like that from previous soil

 

[SCROG IT]

And i always snip those first shoots and leaves myself. Just to get that lower growth outta their from the beggining

 

[TheFertilizer]

Well just as constructive advice... They look a little bit over watered. The leaves start to bend over at the tip like a slice of pizza if they have too much water.

As for my charts and books, probably magnesium deficient from lockout, which happens in slightly acidic (below 7) soil. Plus higher concentration of other elements like ammonia (nitrogen) and calcium lock it out. It's mostly harmless though.

 

[electro gypsy]

Well just as constructive advice... They look a little bit over watered. The leaves start to bend over at the tip like a slice of pizza if they have too much water.

As for my charts and books, probably magnesium deficient from lockout, which happens in slightly acidic (below 7) soil. Plus higher concentration of other elements like ammonia (nitrogen) and calcium lock it out. It's mostly harmless though.

Agreed. Let them dry until the pot is light before watering. Try a week dose of Cal-Mag with the next watering and you should be good. Those leaves will eventually dry up and fall off. I wouldn't cut them yet. Not until the deficiency is corrected.

 

[Lifeandtimes]

Hey everyone, thanks very much I really appreciate all your input. ..I will get some cal mag and use that,iv got some ph down to bring the ph down just in case that's no helping, I feel it may be the crap soil she was germinated in that's caused it so hopefully the newer soil keeps the new leaves etc healthy. Finger crossed