J4RT

Any idea What causes these deep, wine-colored splotches?





BananaHydro2016 - Album on Imgur

Ordered the little fellas online 3 months ago. Mix of Gran Nain, Gold Finger, Lady Finger - or at least what I was sold . VERY SLOWLY, and with the mystical properties of Mycorrhizal powder, weaned them off soil and eventually indoors in my hydro setup. About 1 month after they went hydro, these large red spots started tattooing all new leaves on most of the nanas. The nutrient solution is similar to the color of the spots, so thinking I might be 'staining' the leaves? Cultivar specific?

Leaf emergence rate seems good, a new and larger leaf every 4-5 days. Corms solid like a turnip and thickening. Pearly white roots everywhere. Nice 'crisp' pseudostem that isn't squishy at all. Growing so fast baby!!!!

Details:

• 600w MH (measured with meter to be 500-1000 PAR), 18 hours per day
• GH Flora base 3-part nutrients + all the 'expert series' stuff (FloraBlend, Floralicious, Armor SI, Rapid Start, etc...)
• N:P:K %'s = 30:35:58 (maybe N too low?)
• Medium is rockwool. Both the 6" blocks and 'grow cubes' in 'air pots'
• Dripper irrigation, min 8x per day (medium always moist)
• Solution PH of 5.8, ~1400PPM
• RO water, with recommended dose of CalMag+ to supplement
• Humidity 30-50%
• Day temp 81F, Night 73F

Any thoughts on the color? Just cosmetic or larger problem at play?

Gabe15

It's a normal trait of some cultivars, particularly when young, they usually tend to disappear as the shoots get older.

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Growing bananas in Colorado, Washington, Hawaii since 2004. Commercial banana farmer, 200+ varieties.

chris_zx2

beautiful, simply beautiful.

I'm guessing that room wasn't designed with bananas in mind

either way I'd love to see pictures of the whole setup. It gives me ideas on how to improve mine!

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--Chris
So far:
Dwarf Cavendish -- Basjoo -- Bunch of Truly Tiny

Botanical_Bryce

I have a super dwarf cavendish that had those spots just like that. Later turned green and glaucus.