Germination
ProEarth Organic Seeding Mix for conventional seed-cell and tray propagation.
Three stages, three different jobs
Seed Starting & Propagation
Propagation is a journey. Germination media, soil-blocking media and the next potting-up medium should not be collapsed into one recommendation.
Propagation journey
Germination → Soil Blocks → Potting Up
Identify the production stage before choosing the medium and commercial format.
Soil Blocks
ProEarth Organic Blocking Soil Mix for cohesive soil-block production.
Potting Up
Growers Professional or another appropriate longer-term medium after establishment.
Stage detail
Trays, blocks and established production need different behavior.
Specialty Soils observes that Organic Blocking holds more moisture and dries more slowly than the comparison media it has observed; that does not make it universally better for seedlings.
Germination trays
Prioritize uniform moisture, seed contact, young-root development and appropriate air space.
Learn more →Soil blocks
Use the active soil-blocking product where cohesion and block handling are required.
Learn more →Potting-up baseline
Move established seedlings into a medium suited to the next container and production duration.
Learn more →Commercial quantities
Plan bags, pallets, repeat supply, samples and production timing.
Learn more →Products to compare
Compare products by propagation stage.
The current Seeding and Blocking products lead to real catalog pages, pricing and formats.
Potting & Grower Media
ProEarth Organic Seeding Mix
Organic seed-starting mix for vegetables, herbs and flowers.
Bagged · Bulk · From $25.60
Offered — confirm current stock
View Product
Potting & Grower Media
ProEarth Organic Blocking Soil Mix
Fine-particle organic seed-starting mix intended for soil blocks.
Bagged · Bulk · From $12.65
Offered — confirm current stock
View Product
Potting & Grower Media
Growers Professional
Versatile professional growing mix for plants that prefer a moderately acidic root zone.
Bagged · Bulk · From $10.00
Offered — confirm current stock
View Product
Potting & Grower Media
Gardener's Organic Secret
Organic all-purpose potting and planting blend for containers, raised beds and everyday gardening.
Bagged · Bulk · From $10.00
Offered — confirm current stock
View ProductKeep learning
Use the next guide when you need more detail.
The best next step depends on the decision still in front of you.
Seeding Mix vs. Blocking Mix
Compare related products without treating them as interchangeable.
Learn more →Seed Starting vs. Potting Media
Separate germination requirements from long-duration production.
Learn more →How to Trial a Growing Medium
Make a production decision from a meaningful comparison.
Learn more →Common questions
Seed Starting & Propagation FAQs
Use the project details—not the broad label alone—to choose the next step.
Should every propagation project use Seeding Mix?
No. Germination trays, soil blocks and potting-up are distinct stages with different media needs.
Which product is for soil blocks?
Use ProEarth Organic Blocking Soil Mix for soil-block production.
Is Blocking always better for seedlings?
No. Specialty Soils’ moisture observation does not make Blocking universally better. Choose according to the propagation system and irrigation.
What comes after germination?
Choose the potting-up medium according to the next container, crop, irrigation, fertility and production duration.
Planning commercial propagation quantities?
Share the stage, tray or block system, volume, packaging and repeat schedule.
Separate the propagation stage
Germination, soil blocking and potting-up are not the same job.
Use this project page to choose the stage before selecting a medium. Professional crop and production decisions continue through the Farms & Propagation and Greenhouse paths.