What is the pH and PPM of the soil runoff? Sounds like you’re growing with organic inputs; what fertilizer have you fed and when? Could be anything from a lack of nutrition, imbalance in the soil, pH being off, or something else.
I’d rock two lights with a flowering coverage area in that space – one for each side of the grow space. Here’s my picks for the best LED grow lights for that space:
How does the plant look? You might be able to just ride it out if the plant is fine since you’re so close to harvest. But if you think it needs a flush, go for it.
I’m late to the party here. Seems like all your questions got answered but let us know if you have anymore. Also I wanted to mention the list of best LED grow lights for a 2×4 coverage area since you asked. See a list of my picks here:
