which picture do you see a ball in? i only see female preflowers. leave them longer do not hack any yet. i had a plant that was male and the balls come in bunches usually and they take awhile to spew so you're fine. let them go until you see 2+ balls in one preflower area. the ball with a horn on the top is usually a female, and thats all i see here.

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"If the yellowing is on the rounded leaves at the bottom, then dont worry about it because those arent real leaves."