Sprout Island Blend Organic Seed Starter

• Ready-To-Use Seed Start
• Mycorrhizae + Castings Blend
• Moisture + Air Balance
• 16-Quart Bag Size

Sprout Island Blend Organic Seed Starter is built for the moment seeds crack and cuttings need roots, when a heavy potting mix can slow everything down. This ready-to-use blend combines compost, sphagnum peat moss, perlite, kelp, and worm castings, with a starter charge that includes mycorrhizae to support early root development. It holds moisture evenly without staying waterlogged, which helps prevent the soggy conditions that lead to damping off. We find that this starter provides consistent germination in trays and steady nutrition for several week after.

The texture is light and fluffy, so delicate roots can move fast and establish a tight, fibrous root ball for transplanting. Perlite keeps airflow moving through cell packs and flats, while the organic ingredients provide gentle nutrition that won’t overwhelm young seedlings. Use it for vegetables, flowers, and herbs, then transition seedlings to a richer potting soil and begin a regular feeding routine once growth takes off.

Product Specs

• Intended use: Seed germination and rooting cuttings
• Package size: 16 quarts
• Ingredients: Compost, worm castings, kelp, perlite, sphagnum peat moss
• Includes: Mycorrhizae, cured compost starter charge

Product Tips

• Moisten the mix with warm water before filling trays so it hydrates evenly.
• Fill cells to within 1/4 inch of the top and tap lightly to settle—don’t pack it down.
• Water gently after sowing so you don’t flood the full cell depth.
• Provide 12–14 hours of light once sprouted to prevent leggy seedlings.
• Start feeding after transplanting into a larger container or garden bed, once plants are established.

FAQs

What is Sprout Island Blend best used for?

It’s designed for seed starting and rooting plant cuttings in cell packs, trays, and flats.

What ingredients are in the mix?

A compost-based blend that includes compost, sphagnum peat moss, perlite, kelp, and worm castings.

Why does it include perlite?

Perlite improves aeration and drainage, helping reduce overly damp conditions during germination.

Does it contain a nutrient charge?

Yes. It includes worm castings, kelp, fully cured compost, and mycorrhizae to support early growth.

Is it organic?

Yes, it’s covered under A.M. Leonard’s 30-Day Down to Earth Guarantee and is positioned as an organic seed starting blend.

SKU:

123SI4000-AML