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March is a crucial month for gardeners in Zone 7, as the weather warms and the soil becomes ready for planting. Choosing the right organic fertilizers can boost plant growth and ensure a healthy harvest. Here are the top five organic fertilizers to consider for your March planting in Zone 7.
1. Compost
Compost is a rich, natural fertilizer made from decomposed organic matter. It improves soil structure, enhances nutrient content, and promotes beneficial microbial activity. Applying compost in March prepares the soil for seedlings and young plants.
2. Fish Emulsion
Fish emulsion is a liquid fertilizer derived from fish waste. It provides a quick source of nitrogen and trace minerals essential for leafy greens and vegetables. Dilute according to package instructions and apply every few weeks during March.
3. Bone Meal
Bone meal is a slow-release fertilizer high in phosphorus, which supports root development and flowering. It is especially beneficial for planting bulbs, tomatoes, and peppers in early spring.
4. Seaweed Extract
Seaweed extract is a natural source of trace minerals, growth hormones, and antioxidants. It encourages healthy plant growth and stress resilience. Use as a foliar spray or soil drench during March.
5. Manure
Well-composted manure from cows, chickens, or horses enriches the soil with nitrogen, phosphorus, and potassium. It improves soil fertility and promotes vigorous plant growth for your March garden.