Coast of Maine
Coast of Maine Sprout Island Seed Starter Soil
Best organic blend for nurturing delicate seedlings and new cuttings.
Nurture your seedlings with Coast of Maine Sprout Island Seed Starter Soil. This premium, compost-based blend is specifically crafted for the delicate needs of new seeds and cuttings. It features a rich mix of sphagnum moss, aged bark, perlite, and beneficial amendments like kelp meal, lobster/crab shell meal, worm castings, and mycorrhizae. This thoughtful combination ensures natural, slow-release nitrogen, excellent moisture retention, and proper aeration for optimal early growth. It is OMRI listed, confirming its natural ingredient base. Simply moisten, fill your container, and provide the ideal environment for your plant babies to thrive.
$18.95
Owner Satisfaction
4.7
/ 5
Category Rank
11
/ 1247
#11 in Soil
Price vs Category Average
-63%
Below average
Volume
16
/ QT
Who it's for
- Indoor starters wanting to prevent root rot and damping off
- Gardeners seeking high germination rates for delicate seeds
- Organic growers needing gentle nutrition for fragile seedlings
Who should skip it
- Indoor gardeners sensitive to potential fungus gnat issues
- Budget-conscious shoppers looking for affordable bulk options
- Shoppers needing convenient access at local big box retailers
Performance breakdown
Seedling Germination Support
Fine texture creates the perfect environment for delicate root development.
Nutrient Density
Rich blend of worm castings and kelp provides essential early nourishment.
Moisture Retention
Sphagnum moss base keeps soil consistently hydrated for vulnerable young sprouts.
Aeration Quality
Perlite integration prevents compaction and ensures roots get necessary oxygen.
Organic Integrity
OMRI listing guarantees a clean, chemical-free start for your garden.
Root Colonization
Added mycorrhizae actively promote strong, healthy root system establishment.
Key Specs
Volume
16 QT
Bag Volume
0.565 cu ft
Base
Compost-based soil
Texture
Fine
Moisture Retention
High
Intended Use
Seed Starting
Primary Amendments
Compost, Worm Castings, Mycorrhizae
Certification
OMRI listed
Features
- Ideal for starting seeds and cuttings
- Provides slow-release nitrogen
- Optimizes moisture retention
- Enhances soil aeration
- Coddles young plants effectively
- Made with natural ingredients
- OMRI Listed for organic gardening
What customers say
Sprout Island soil earns high marks for its exceptional quality and reliability. Reviewers consistently praise its fine, light texture, ideal for delicate seeds. Users report significantly improved germination and robust early growth, confirming its dependable performance. This soil simplifies seed starting, requiring no extra amendments, making it incredibly easy to use. While the price is higher, customers agree the superior results offer excellent value, making it a worthwhile investment for serious seed starters seeking dependable success.
Know before you buy
Yes, it is specifically formulated for indoor seed starting and cuttings. Its fine texture and moisture-retentive properties provide the ideal environment for delicate root development.
It does not contain synthetic fertilizers. Instead, it relies on natural amendments like kelp meal, lobster and crab shell meal, and worm castings to provide slow-release nitrogen for your young plants.
Mycorrhizae are beneficial fungi that form a symbiotic relationship with plant roots. They help improve nutrient uptake and water absorption, which is critical for establishing strong, healthy seedlings.
Yes, Sprout Island Seed Starter Soil is OMRI listed, meaning it meets the standards for use in organic gardening and production.
This mix is much finer than standard potting soil. This fine consistency ensures better contact with small seeds and prevents air pockets, which helps maintain consistent moisture levels for germination.
Still have a question?
Ask Hayley anything about this product before you decide.