For consistent nutrient supply in hanging baskets over several weeks with minimal labor, which fertilizer type is most appropriate?

• A. Compost tea
• B. Liquid fertilizer applied weekly
• C. Controlled-release fertilizer
• D. High-nitrogen quick-release

Answer: (C)

The key idea here is providing a steady nutrient supply over several weeks with minimal maintenance. Controlled-release fertilizer fits this need because it is designed to release nutrients gradually over time, often over weeks to months, through a coating that moderates how quickly nutrients become available. In hanging baskets, where roots are small and frequent watering can cause nutrient fluctuations, this slow, ongoing release helps keep nutrients available to plants between feedings and reduces the risk of salt buildup from repeated applications. It also dramatically cuts down on labor since you don’t need to mix or apply fertilizer weekly.

Compost tea can be unpredictable in nutrient content and timing, and it requires preparation and regular use to maintain supply. A liquid fertilizer applied weekly provides quick availability but demands frequent attention and can lead to spikes in salts or uneven supply if waterings vary. A high-nitrogen quick-release product delivers fast growth but is exhausted quickly, requiring more frequent applications and increasing the risk of flushes or burn. In contrast, the gradual, predictable release of a controlled-release option aligns with the goal of consistent nutrition over weeks with minimal labor.