(Petunia) Add a summer 'pop' of color to your baskets and landscapes with 'Pop Rocks Yellow' Petunia! The bloom color reminds me of a bucket of popcorn, darker yellow in the center and fading to a pale yellow on the edges. Standing a mere 4-6 inches tall, and growing to widths of 3-3.5 feet, 'Pop Rocks Yellow' creates a nice spreading mound. Fertilize petunias often for best results. We do recommend fertilizing your 'Pop Rocks' every 1-2 weeks with a water soluble fertilizer. This helps keep your plants well nourished providing you with loads of color. You may find that mid season your baskets and planters need a manicure. We recommend trimming your 'Pop Rocks Yellow' back to approximately the bottom of your hanging basket or container. This will encourage more branching and freshen up your planter.