This is my first grow. I am 4 weeks into flowering and some of the upper older leaves are turning yellow. I have been using peters 10-30-20 for 3 weeks at half strength. Looks like nitro def. Its not burn. I am using soil. Its bagweed seeds but seems to be mostly indica.

My question is...... Is this common halfway through flowering and should I keep using the 10-30-20 or........ should I give it a shot of high nitro ferterlizer one time then switch back to 10-30-20. Or mabey even start using the 10-30-20 at full strength

basically should I leave it alone or try and fix it this late in flowering.

Attached Images

Ganja nitro 001.jpg (131.9 KB, 128 views)

It could be caused by lock out so adding more ferts will worsen it. Have you flushed?

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