Natural yellowing?

Obviously my first grow. Plant is well into week six of flower, buds are swelling nicely, great trichs. This guys started turning this color about a week ago, others have since succumb. I know the leaves start to yellow towards the end of flower but something about how it is yellowing from the interior out make me think deficiency...should I even be concerned at this point?

what kind of fertilizer are you using? does it have micro nutrients?

don't look that bad ,my leaves on my first grow at the last few weeks looked like daffodil petals ,that yellow .

Veg - Jack's Classic (20/20/20); Flower - Dyna-gro liquid bloom (3-12-6) both have micro's and both used per instructions. I flushed the soil three days ago anticipating harvesting in a week or two.

week 6 is in my opinion kind of late to be worried. but you can tell a lot form the leaf, it will show deficiencies ph issues and things you had go wrong in the start of your grow. A lot of the fan leafs store food to be used for bud production at the end of the plants life cycle. Week 6 your seeing the plant pull from the larger leafs and this is most times not reversible if the the damage is done. I have seen people try to fix plant issues based on old growth and really messed things up. I would just keep the PH in check and ride it out.

looks like magnesium deficiency. just use a micronutrient sup. like cal-mag.

The plants have been completely healthy throughout. pH is always around 6.8

Ganjarob said:

looks like magnesium deficiency. just use a micronutrient sup. like cal-mag.

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That even worth the expense this late in the game?