Bag seed plant problem

Any opinions what this is. just some bag seed in ocean forrest and using fox farms trio and 46 watt cfls all ph water and nutes are 6.5 going in but it seems slow growing. The couple brown spots are from my lights

Calcium def? What is the ph of your runoff? it looks similar to another thread where the irregularly shaped blotches looked like P def to me, but others said it was due to alkaline soil locking out boron. Your photos look more rusty like ca def. More speckled like that. But, the first photo looks like that other guy's.

What is the ppm of your feed solution? And the ppm of your runoff? At this stage of grow it's common to have salt buildup. Maybe cut nutes in half and feed enough for 100% runoff next time? You can get some Ca to your plant by adding 1g of ordinary Gypsum. It's not too soluable but it will get the job done. 1g adds 111 ppm to a gal/water. 61ppm Ca, 49ppm sulfur.

Magnesium deficiency.

Dont have a ppm meter low budget lol i corrected the ph was in the low 5s think that was the prob. For cal i use finely crushed eggshells and epsom salts for mag when needed
The buds still look and smell so good mmmm

rexx890 said:

Dont have a ppm meter low budget lol i corrected the ph was in the low 5s think that was the prob. For cal i use finely crushed eggshells and epsom salts for mag when needed
The buds still look and smell so good mmmm

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FYI: The eggshells are calcium carbonate and won't be available to the plant (not much). Gypsum is more available (and supplies sulfur, but that could be too much sulfur if you use it with epsom salt which also has sulfur.). You can dissolve those eggshells in white vinegar and have calcium acetate which I believe is more immediately available. You dehydate the solution after 2-3 weeks of dissolving, crush up the crystals. 1g/gal gives 60ppm Ca.

Ayeahhh, calcium bad. Throw the egg shells in the trash, unless you want to compost them and then add that to your soil. Find a calcium supplement and use it soon. Or just get calmag, use it now, and skip some of the epsom salts next time if you keep using it.