Espoma Organic Bio-Tone Starter Plus 4-3-3 — Mycorrhizal Starter Fertilizer (8 lb)

Smart start for every plant

Espoma Organic Bio-Tone Starter Plus 4-3-3 is a natural, organic plant food built with beneficial bacteria, humates, and both Endo and Ecto mycorrhizae. This bio-active mix works quietly in the soil to help new transplants establish faster, endure environmental stress, develop a deeper root network, and support more vigorous blooms. It’s designed for transplanting and planting in tougher sites, providing a steady soil-nurturing boost without synthetic additives.

What makes it work

• All-natural ingredients crafted to complement soil biology for a strong start
• Endo and Ecto mycorrhizae support root exploration, nutrient uptake, and network growth
• 4-3-3 analysis with 5% calcium helps access essential minerals
• Environmentally safe with no sludges or toxic additives
• Approved for organic gardening and proudly made in the USA

Real-life benefits and use cases

Gardeners often notice deeper, more developed root systems, improved soil structure, and richer blooms when Bio-Tone Starter Plus is used during planting or transplanting. The product is designed to support a wide range of plants and settings, offering a reliable foundation for healthy growth.

Beyond new plantings, it can help seedlings and transplants cope with variable conditions, giving roots a better start in less-than-ideal soils. The emphasis on soil biology suggests a more resilient planting environment, where roots can explore more efficiently and nutrients are more readily accessed.

How to use by planting type

Flower beds: mix 4 lb (about 12 cups) into the top 4–6 inches of soil per square foot. Bulbs: place 1 teaspoon in the planting hole before setting the bulb. Plotting mixes: blend 9 lb per cubic yard or 1 cup per cubic foot. New lawns: apply 25 lb per 1,000 sq ft before seeding or laying sod.

Notes on organic gardening and safety

• Certified for organic production and safe for organic landscapes
• Made in the USA by Espoma, a trusted name in natural organics since 1929