Sustane 4-6-4 Flower & Vegetable Plant Food | 20lb - OMRI Listed

Compost-Based Fertilizer for Flower and Vegetable Beds, 20lb

A compost-based fertilizer supplies more than a single N-P-K number on the bag; the organic matter and microbial activity in a compost-derived formula also build soil structure over time, which a synthetic fertilizer alone doesn't do. Sustane's 4-6-4 formula is a natural organic fertilizer built on biologically stable compost, supplying a balanced nutrient ratio alongside the soil-conditioning benefits of that compost base.

This 20lb Flower & Vegetable size fits a home gardener working several garden beds who wants a larger retail bag rather than reordering the smaller 5lb size repeatedly through the season.

Key Features & Benefits

• 4-6-4 Compost-Based Formula — a balanced, natural organic nutrient ratio built on biologically stable compost.
• Contains All 17 Essential Plant Nutrients — a high-organic-content formula rather than a narrow N-P-K-only fertilizer.
• Builds Soil Structure Over Time — improves texture and water-holding capacity as organic matter breaks down.
• Supports Microbial Diversity — compost-derived organic matter feeds soil biology alongside plant nutrition.
• OMRI Listed — certified for use in organic production.

Who Should Use Sustane 4-6-4

This formula fits growers establishing new plantings, preparing flower and vegetable beds, or maintaining greenhouse and nursery stock who want a balanced organic nutrient source that also improves soil structure over repeated applications, from a landscape crew running bulk 50lb bags to a home gardener working a few garden beds with a smaller retail bag.

About Sustane Natural Fertilizer

Suståne Natural Fertilizer, founded in 1988 and headquartered in Cannon Falls, Minnesota, manufactures compost-derived organic slow-release fertilizers domestically and exports them to more than 60 countries. Its catalog includes the 4-6-4 and 8-2-4 granular formulas used across agriculture, turf, landscape, nursery, greenhouse, and retail lawn-and-garden markets.

Frequently Asked Questions

What does the 4-6-4 ratio mean?

4-6-4 refers to the guaranteed percentages of nitrogen, phosphorus, and potassium in the formula, in that order. It's a balanced ratio rather than one skewed heavily toward a single nutrient, suited to general planting, bed preparation, and maintenance feeding.

How is this different from a synthetic 4-6-4 fertilizer?

This formula is compost-based, so beyond the guaranteed N-P-K numbers it also supplies organic matter and humates that build soil structure and support microbial activity over repeated applications. A synthetic fertilizer with the same N-P-K ratio supplies the nutrients but not that soil-conditioning benefit.

When should I apply this fertilizer?

It's suited to plant establishment, general bed preparation for flowers and vegetables, and ongoing greenhouse or nursery feeding, rather than a single late-season application. Follow label rates for the specific crop and application method.

Is this fertilizer safe for organic production?

Yes, Sustane's 4-6-4 formula is OMRI Listed, meaning it's certified for use in organic production systems. That certification applies across all package sizes of this formula, from the retail bags up to the bulk 50lb bag.

Why are the 50lb bag and the smaller bags sold under different product names?

The 50lb 'All-Purpose Fertilizer' and the 5lb/20lb 'Flower & Vegetable Plant Food' share the same 4-6-4 compost-based formula. Sustane positions the larger bag toward professional landscape, greenhouse, and nursery buyers, and the smaller bags toward home gardeners preparing flower and vegetable beds.