Gardeners who want their potted flowers to actually flower know they need fertilizer to supplement natural feeding. Slow-release fertilizers that look like tiny bubbles have eliminated much of the muss and fuss of this process. No more liquids to measure and mix. No repetitive schedule to keep. And if you go one step further and mix some of the bubbles into the soil mix as you plant your pot, you can free yourself from feed duty for months, or maybe for an entire growing season.