Botanic Garden >> Gardening > >> Question and Answer >> Organic Gardens

Choosing Safe Soil for Organic Seeds: What to Look For

The 50/50 Mix Question

Commercial "50/50" blends (topsoil, manure, pine fines) vary widely. Pesticide contamination is unlikely if no fertilizer is added, but certification ensures purity.

Best Practice

Buy bagged soil labeled "organic" (OMRI-listed).
Check texture: should be loamy, not sandy or clay-heavy.
Amend with certified organic compost for optimal fertility.

Why It Matters

Organic seeds deserve a clean start. Certified soil eliminates guesswork and supports true organic integrity from day one.

Organic Gardens: Does Horse Manure Cause Soil Compaction? Understanding Organic Matter Breakdown; Building the Perfect Raised Bed Soil Mix in Palm Desert; Germinating Date Palm Seeds; Evaluating 50/50 Soil Blends for Organic Gardens: A Follow-Up; "Organic" Bagged Soil: What the Label Means and GMO Concerns; Organic Soil Amendment for High pH, High Mg, Low K Raised Beds; Mulching Newly Planted Seeds with Straw; Compost: The Complete Guide to Buying, Evaluating, and Using Nature's Best Soil Builder; Building Healthy Organic Garden Soil: The Foundation of Abundant Harvests; Sowing Seeds Directly in the Garden: Rows vs. Broadcasting

Garden Articles

Soil Mold and Jade Plant Leaf Spots: Management

Mystery Flower in Virginia: 4-Petaled Pink Star with Lemonade Scent

Yellow Patches in Newly Seeded Lawn: Too Thorough, Not Wrong

Where Do Vegetable Seeds Come From? The Plant Life Cycle Explained

Starting Seeds Indoors: A Complete Guide to Giving Your Organic Garden a Head Start

Preparing Soil for Organic Gardening: Testing, Amending, and Building Living Earth

The Simple Secret to Gardening Success: Work With Your Soil

Plants

Troubleshooting Brown, Drying Leaves on Yellow Holly Bushes

Rehabilitating Salt-Affected Soil with Carbon: A Guide for Coastal Organic Farming

Organic Seeds and Certification for Home Gardeners

Lye Contamination in Garden Soil: Assessment and Remediation

Building Soil Fertility with Liquid Seaweed, Fish Emulsion, and Clover Cover Crops

Finding Organic Apple Orchards to Visit in Southern California

Converting a Chemically Treated Lawn to Organic: Start with Soil