Leaves around buds are drying up

From a fellow grower: leaves around my buds on my feminized plant are drying up and i lost 4 already

Skywalker o g feminized

Small greenhouse

Hot and humid south Texas

Soil

Fertilizer is pee and shit

Sunlight

90s daytime 70 and 80s at night

Ventilation screen in front, door and 2 exhaust fans

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Can you get a clearer pic?