Vegan Organic Fertilizer for Potted Tomatoes in Florida

Fish-Free Fertilizer for Container Tomatoes

A Florida gardener grows tomatoes in a 13" clay pot, avoids fish fertilizer (vegan), sees yellowing leaves (nitrogen deficiency). Needs organic, non-GMO options.

Vegan Nitrogen Sources

• Alfalfa meal/pellets – 2–3% N, slow-release, adds triacontanol (growth promoter).
• Soybean meal – 7% N, fast-acting; ensure non-GMO/organic.
• Blood meal alternative: Feather meal (12% N, slow) or cottonseed meal (6% N, acidic – good for FL alkaline water).
• Liquid: Seaweed/kelp extract + hydrolyzed plant protein (e.g., AgroThrive, Neptune's Harvest vegan line).
• Compost tea – from diverse plant-based compost.

Complete Nutrition for Potted Tomatoes

• Potting mix: 1/3 compost, 1/3 coconut coir, 1/3 perlite + 1 cup alfalfa meal + 1/2 cup rock phosphate + 1/4 cup greensand per cubic foot.
• Weekly feed: Dilute liquid kelp + plant protein (per label).
• Calcium: Gypsum (1 tbsp/pot monthly) – prevents blossom end rot.
• Magnesium: Epsom salt (1 tsp/gal monthly).

Container-Specific Tips

• Clay pots dry fast – check daily; water thoroughly.
• Mulch surface (straw, shredded leaves).
• Stake/cage at planting.
• Full sun (8+ hrs).

Resource

Avant Gardening Resources – links to Planet Natural (vegan fertilizers).

Bottom Line

Yellow leaves = nitrogen hunger. Use alfalfa meal, soybean meal, or vegan liquid fertilizers. Amend potting mix with rock phosphate/greensand. Water consistently.