Pacific Northwest Mushrooms Cultivation & Nursery Stock
Sterile grain spawn, colonized grain spawn, heritage apple trees, bonsai starters, Nepenthes, and aquatic plants from Milwaukie, Oregon. Specialty nursery and tissue culture lab for Pacific Northwest growers.
Mycology Supplies
Sterile Grains & Substrates
Sterilized fortified whole grains, made fresh in Oregon for gourmet and medicinal mushroom cultivation.
Sterile Grain Spawn
3.5 qt sterilized fortified whole grains with 0.5 micron filter patch and self-healing injection port. Ready for inoculation via syringe, grain-to-grain, or agar. Made fresh in Oregon.
3-Pack — 10.5 qt Total
Box of 3 bags of sterilized fortified whole grains. Each bag includes filter patch and injection port. Save $20 versus buying singles.
6-Pack — 21 qt Total
Box of 6 bags of sterilized fortified whole grains. 21 quarts total. Our lowest per-bag price for larger grows and repeat inoculations.
12-Pack — 42 qt Total
Case of 12 bags of sterilized fortified whole grains. Ideal for serious cultivators running multiple strains or scaling up production.
20-Pack — 70 qt Total
Our largest standard pack. 20 bags of sterilized fortified whole grains for high-volume grows, farm operations, and repeat customers.
New Product Line
Colonized Grain Spawn
Species-specific colonized grain spawn, fully inoculated and ready to fruit. Skip the inoculation step — just break up, mix with substrate, and grow. Coming soon from our lab in Oregon.
Colonized Spawn
4 lb bag of fully colonized grain spawn. Species-specific — choose from oyster, shiitake, lion’s mane, and more. Ready to mix with your substrate.
3-Pack — 12 lbs Total
Three 4 lb bags of colonized grain spawn. Mix species or order all one variety. Save versus buying singles.
6-Pack — 24 lbs Total
Six 4 lb bags of colonized grain spawn. Our best value for getting a serious grow started or keeping production rolling.
Nursery Stock
Specialty Plants & Nursery Stock
Heritage fruit trees, bonsai starters, carnivorous plants, and aquatic species — propagated and grown in the Willamette Valley.
Fruit Trees
Heritage Apple Trees
Dwarf and semi-dwarf heritage varieties grafted onto container rootstock. Gravenstein, Cox's Orange Pippin, Ashmead's Kernel, and other heirlooms you won't find at big-box stores.
Coming 2026
Bonsai
Bonsai & Japanese Maple
Pre-bonsai starter stock and Japanese maple seedlings for the Portland bonsai community. Air-layered cultivars and seed-grown rootstock, developed for long-term training.
Coming 2026
Aquatic
Aquatic & Bog Plants
Hardy water lilies, water lettuce, fairy moss (Azolla), rushes, cattails, and bog species. Pond plants, rain garden species, and living biofertilizer — grown in our own pond system.
View Collection →
Tissue Culture
Plant Tissue Culture Lab
In-house tissue culture propagation for clean, disease-free stock at scale. Enabling mass propagation of high-value cultivars across our nursery lines and for other growers.
Coming 2027
Carnivorous
Nepenthes Breeding Program
Tropical pitcher plants bred and propagated in-house. Species, hybrids, and our own crosses available as rooted cuttings and tissue culture plantlets. Building a diverse collection for collectors and growers.
Coming 2026Our Story
Rooted in the Pacific Northwest
SeaSpores started to make fresh sterile grain spawn easier to get in Oregon and the Pacific Northwest. We prepare our grain bags locally so growers can source closer to home and get started sooner. We’re also developing a line of species-specific colonized grain spawn — fully inoculated bags that are ready to fruit, no syringe or agar work required.
Our nursery side focuses on specialty plants you won't find at chain garden centers: heritage apple varieties on dwarf rootstock, pre-bonsai and Japanese maple starter stock, Nepenthes tropical pitcher plants, and aquatic plants propagated from our own pond system. We're building a tissue culture lab to enable clean, scalable propagation across all our plant lines. Everything is grown in the Willamette Valley.
Need bulk quantities, wholesale pricing, or current availability? Email us anytime. We offer local delivery across the Pacific Northwest and California, plus nationwide shipping on online orders.
Coming Soon
We're Relaunching
Our online store is being rebuilt with an expanded product line. Mycology supplies, heritage apple trees, bonsai starters, Nepenthes, and aquatic plants will be available for order soon. Email us for current availability.
Get in Touch
Questions & Orders
Bulk orders, wholesale inquiries, and current availability.
sales@seaspores.orgMilwaukie, Oregon — Serving the Pacific Northwest & California
