1st auto grow - rust spots - can you help?

Grow Support Autoflowers
1

• Sonoma Seed - Strawberry Cough Fem Auto currently 29 days from seed.

• FFOF - FF trio nutes

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and Cal Mag

  • 3 gallon fabric pot

• 6.3 PH in and ?Runoff as I forgot to measure that.

• Indoor 2x2 tent no in-line fan yet - just 4” oscillating at base and another stationary fan at door. All lower tent vents closed and vets at top are open with air being expelled.

Light specs pic included

• Day temps 68-75 night temps averaging the same - with 40-60%Rh

  • A/C on in room as is ceiling fan

• Have both humidifier and dehumidifier capability as needed only.

• Co2; NO

Shares tent with her sister AND same age Afghan and no issues on that one.
(Afghan is moving to another tent this coming week now that they are bigger)

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The plant in question is in the back on the left side

2

Bump up that input ph closer to 6.8. Also pick up some plain epsom salt and add about 1/4 tbsp to your mixture on non feed days. Fox farms nutes never have enough magnesium for these plants.

3

Thank you @BobbyDigital - I upped the cal-mag a little in the nutes feed but didn’t want to overdo it so thought it best to ask. Epsom salt is something I always have so I will try that!

4

Just make sure it’s not fragranced epsom. The problem with using calmag to help with magnesium levels is you’re adding calcium and nitrogen that you may not need. Fox Farms is fine with calcium; it’s the magnesium that’s lacking so hit it with straight magnesium.