Slush Mint Cake - purple leaf tips

Looking at your photos, this is actually both strain genetics AND early phosphorus/potassium stress not harmful, just something to dial in. Slush Mint Cake naturally expresses purple/red anthocyanin pigments, especially in flower under cool temps or when the plant begins nutrient translocation. That’s the strain showing its colors. But the browning on the edges suggests your plant is starting to pull some micronutrients as flowering progresses totally normal at week 4. Is it a problem? Not really. The plant is healthy otherwise. The discoloration will likely intensify as you move into weeks 5–7, which is when late-flower nutrient fade kicks in naturally. If you’re seeing new growth coming in clean and green, you’re fine. What to do: Just monitor. If the browning accelerates aggressively across new leaves or spreads to the buds, dial back feeding slightly. Otherwise, let the strain express itself some of the best cannabis has purple/rusty tips in late flower. Your plant looks solid. Don’t overthink this one.​​​​​​​​​​​​​​​​