Wondering if your urban planter box plants are thriving or just surviving? Nutrient balance is key. Start by observing your plants. Common signs of nutrient deficiency include yellowing leaves (often nitrogen), purplish tints or poor flowering (phosphorus), and brown leaf edges or weak stems (potassium). Stunted growth can also be a major clue.
Don't just guess—test your soil. Use a simple home test kit to check pH and key nutrient levels. Container soil depletes faster than garden soil, so regular feeding is crucial. Choose a balanced, water-soluble fertilizer or a slow-release formula designed for containers. Always follow label instructions to avoid over-fertilizing, which can burn roots.
Remember, healthy plants need more than just NPK (nitrogen, phosphorus, potassium). Ensure your potting mix is fresh and high-quality, as it provides the foundation. Water properly, as over- or under-watering can mimic nutrient problems. With careful observation and consistent care, your planter box garden will be lush and productive all season long.