Keeping your urban planter boxes lush and productive requires the right nutrition. Unlike garden soil, container mix loses nutrients quickly through watering. Here’s your guide to choosing the perfect fertilizer.
First, understand the basics. Fertilizers are labeled with an NPK ratio (Nitrogen for leaves, Phosphorus for roots/flowers, Potassium for overall health). A balanced, all-purpose formula like 10-10-10 is a great start.
For most edible plants (herbs, vegetables) and flowers, a slow-release granular fertilizer mixed into the potting soil is ideal. It feeds plants steadily for weeks. Pair this with a water-soluble liquid fertilizer every 1-2 weeks for a boost during peak growth.
Organic options like compost, worm castings, or fish emulsion improve soil health and provide gentle, long-term nutrition. Synthetic fertilizers offer precise, fast-acting nutrients.
Key tips: Always follow label instructions to avoid burning plants. Water thoroughly before and after feeding. For leafy greens, use a higher Nitrogen formula. For tomatoes and peppers, choose a fertilizer higher in Phosphorus as they flower.
By combining a slow-release base with regular liquid feeds, you'll ensure your urban oasis gets all the nutrients it needs to thrive.