Leaf Septoria can affect a cannabis plant
Growing Cannabis

Why Does My Cannabis Have Yellow Spots?

It starts with one or two tiny yellow spots on the bottom leaves, and before you know it, it’s climbing up your 15-foot giant. Most growers see yellow and immediately start dumping nitrogen on the plant, thinking she’s hungry. But if those spots have a dark border and look like a bullseye, you aren't dealing with a hunger strike—you’re dealing with Leaf Septoria.
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