Forestry and Seed Storage Walk in Coolers and Freezers

State forestry departments directly influence the health of wild spaces across the country. Their seedling programs help rebuild essential habitats in areas that struggle to recover from modern environmental challenges, including wildfires, global warming, urbanization, and logging. And as more and more cities think globally and act locally by expanding their urban forests to reduce their carbon footprint, these forestry efforts make even more of an impact.

But seedling programs have unique challenges. Many tree species have sensitive seeds that lose viability when they’re outside of their preferred temperature zone, and germinated seeds can grow prematurely or start to deteriorate with the wrong humidity level or temperature. Pests and disease infestations also pose a constant threat to fledgling trees.

At Polar King, we offer a range of walk in seed coolers and freezers specially designed to provide for the unique needs of the seedling and forestry initiatives, delivering reliable and efficient cold storage where you need it most.

Polar King walk in seed storage coolers and freezers

At Polar King, we understand that maintaining the integrity of your seeds, seedlings, and forestry equipment is vital for the health and growth of your operations. We build our walk in seed storage coolers and freezers to meet the highest standards or quality, so you can count on your products being kept in the best possible condition, even in the harshest outdoor environments.

The Polar King advantage

Polar King walk in seed storage coolers feature polyisocyanurate rigid board insulation, allows superior energy efficiency and eliminates the possibility of hot spots caused by gaps in material. The insulation is encased in continuous, ultra-durable fiberglass inside and out. This one-piece structure is stronger than pieced-together structures and provides a light and bright interior that makes it easier to find what you’re looking for inside.

The durable seamless construction also helps you cut costs because your walk in seed storage cooler or freezer can be placed outside without a roof cap. You can rest assured because every Polar King unit comes with a 12-year complete structural warranty.

1. Temperature Control: Polar King units provide precise temperature control, allowing you to create the ideal environment for germination or storing seedlings and saplings. Need to store items with different optimum temperatures? No problem. We can build a custom seed storage walk in cooler with multiple climate zones to fit your needs.
2. Humidity Control: Choose the best moisture level for storing your seeds, seedlings, and saplings to preserve viability and prevent issues such as mold, rot, or dehydration.
3. Durability: We build our walk in seed coolers and freezers using rugged, seamless fiberglass, making them durable enough to withstand extreme weather conditions and resist wear and tear. You can trust that your investment will last for years to come.
4. Versatility: Looking to store larger forestry equipment, potted plants, or seedlings in trays? We offer a variety of sizes and configurations to fit your specific needs and can customize our walk in seed coolers to accommodate your unique requirements.

Secure Your Seedlings and Forestry Equipment with Polar King

When it comes to securing your precious seedlings, forestry equipment, and optimizing germination conditions, Polar King International stands as your unwavering solution. Our state-of-the-art walk-in coolers and freezers are meticulously crafted to cater to the distinct needs of the seedling and forestry sector, guaranteeing the safety and longevity of your invaluable resources.

State forestry department and urban forestry seedling programs

State forestry departments have been choosing Polar King walk in seed coolers since the inception of the Polar King brand, helping us understand the challenges of preserving seed and seedlings.

Our walk in seed storage coolers have been a dependable cornerstone of forestry operations across various regions. They’ve also played a pivotal role in safeguarding the health and viability of tree seedlings and ensuring the success of reforestation initiatives. Polar King’s legendary durability and reliability have made our walk in seed coolers a valuable asset in preserving the environmental heritage and natural beauty of our landscapes.

Germination optimization: Count on Polar King to create the ideal environment for germination. Our precision temperature and humidity control creates the stable conditions your seedlings need to thrive.

Optimal Temperature Range for Seed Germination: 65-85°F (18-29°C)

Why Choose Polar King International?

Experience: With over 40 years in the industry, Polar King has a proven track record of providing top-quality, reliable, and efficient walk in seed cooler and freezer solutions.
Cost Savings: Investing in a Polar King walk in seed cooler or freezer means eliminating the need for off-site storage facilities and transportation expenses. Save time and money by having everything you need on-site.
Expert Support: Our team of experts is dedicated to helping you find the perfect solution for your seedling and forestry storage needs. We’ll work with you to determine the right size, features, and customization options for your business.

Custom options

Temperature data logging and monitoring systems
Interior and exterior lighting
Redundant refrigeration
Insulated door viewing windows
Custom sizes and configuration
Stainless steel kickplate
Vinyl strip curtains
Shelving package

Interior bumper guards
Custom finishes
Reinforced floor load
54” door
Security hasp locks
Digital thermometers

If you’re facing challenges preserving seeds or seedlings, there’s no need to reinvent the wheel. Contact Polar King today, and find out how our decades of experience with forestry initiatives can help you find the best solution to set your effort up for success.

Frequently Asked Questions

What temperature and humidity conditions do I need to keep tree seeds viable in storage?

Many tree species have sensitive seeds that lose viability when held outside their preferred temperature zone, and the right humidity level is just as important to prevent premature germination and deterioration. The specific setpoints vary by species, so seed storage works best in a unit that gives you precise control over both temperature and humidity. For reference, the optimal temperature range for seed germination is 65 to 85 degrees Fahrenheit, but dormant storage requirements differ by species and should be matched to your inventory.

Polar King walk in seed coolers provide precise temperature and humidity control so you can set and hold the conditions your seed inventory requires.

Can a single walk in hold different species that each require their own storage temperature?

Yes. When you need to store species with different optimum temperatures, a unit can be built with multiple climate zones inside a single walk in. This lets you maintain separate conditions for different seeds, seedlings, or saplings without operating multiple standalone units.

Polar King builds custom seed storage walk in coolers with multiple climate zones configured to your operation, so each zone can hold its own target temperature.

How do I prevent mold, rot, and premature germination when storing seedlings and saplings?

Preventing mold, rot, and premature germination comes down to holding a stable temperature and the correct moisture level for what you are storing. Germinated seeds can grow prematurely or begin to deteriorate when humidity or temperature drift outside the target range, so consistent control of both is the key to preserving viability. Choosing the right moisture setting for your seeds, seedlings, and saplings helps prevent dehydration on one end and mold or rot on the other.

Reliable seedling storage depends on equipment that maintains those conditions steadily over time, which is why precise temperature and humidity control matters more than any single feature.

Is seedling storage practical outdoors, or does the unit need to sit inside a building?

Seedling storage can be located outdoors when the unit is engineered for outdoor use rather than adapted for it. An outdoor-ready walk in does not need to sit inside a separate building and can be placed where it is most convenient for your operation. This is the same outdoor-ready approach used across other applications, such as farm and ranch cold storage.

Polar King units are built with seamless fiberglass construction that allows outdoor placement without an additional roof structure, which can reduce site and construction costs.

Will a walk in seed cooler be large enough to hold forestry equipment and trays along with seedlings?

Yes. Walk in seed coolers are available in a range of sizes and configurations, so a single unit can be sized to hold seedlings in trays alongside larger forestry equipment or potted plants. The right dimensions and interior layout depend on what you need to store and how you access it.

Polar King offers custom sizes and configurations, including shelving packages and reinforced floor load options, so the unit can be built to fit both your inventory and your equipment.

How energy efficient is a forestry cold storage unit that runs continuously outdoors?

A forestry cold storage unit that runs continuously outdoors should hold temperature efficiently even as outside conditions change, which depends heavily on insulation quality and construction. Insulation that resists gaps and hot spots reduces the work the refrigeration system has to do and helps control operating costs over time. When insulation performance stays consistent, energy use and equipment wear stay lower.

Polar King units use polyisocyanurate rigid board insulation encased in seamless fiberglass to support energy-efficient operation and eliminate hot spots caused by gaps in material.

What structural warranty comes with a Polar King walk in seed cooler?

Every Polar King walk in seed cooler and freezer comes with a 12-year complete structural warranty. This reflects the durability of the one-piece, seamless fiberglass construction, which is built to withstand extreme weather and resist wear over a long service life.

For coverage details specific to your configuration and refrigeration components, the Polar King team can walk you through what the warranty includes before you purchase.

How does seamless fiberglass construction protect seed inventory in harsh outdoor conditions?

Seamless fiberglass construction protects seed inventory by forming a one-piece structure with no panel seams where air and moisture can enter and undermine insulation performance. This continuous build resists moisture, corrosion, and extreme weather, which helps maintain stable interior conditions for sensitive biological material. The fiberglass interior is also light and bright, making it easier to locate and manage inventory.

Because the structure is stronger than pieced-together panel construction, a Polar King unit can be placed outdoors without a roof cap and is built to hold up to the demands of forestry operations for years.