Stop crowding your windowsills and start growing like a pro!

Are you tired of leggy, weak seedlings? Are you nervous about that "hardening off" period where one cold night can ruin weeks of hard work? Join Mark Gostkiewicz of Tri Gable Lea Farm for a masterclass in using cold frames as the ultimate plant nursery.

A cold frame isn't just for winter greens—it is a powerful tool you can use for propagation and seed starting. In this workshop, we’ll move beyond the basics and show you how to use a cold frame to jumpstart your garden, grow sturdier plants, and transition your indoor starts to the great outdoors with less stress.

What will I learn in the Workshop?

• The Propagation Powerhouse: An overview of how cold frames act as the perfect "middle ground" for young plants, providing protection while maximizing natural sunlight. It can be a protected place to root cuttings, stratify perennial seeds, and fill your yard with flowers, herbs, and veggies started in a controlled environment. 

• Building & Siting: Learn how to build a frame (new or upcycled) and—most importantly—how to site it specifically for different purposes. We'll also look at portable uses and modular designs that can transform based on your needs.

• Direct Sowing in the Cold: Discover which crops you can sow directly into the frame weeks before the soil warms up elsewhere.

• Mastering the "Hardening Off" Phase: Learn the step-by-step process of using your cold frame as a "nursery" to transition indoor-started plants to the garden without the risk of transplant shock.

• Daily Care & Climate Control: How to manage the "daily dance" of venting and watering to ensure your young starts don't overheat or freeze during unpredictable spring weather.

• Beyond the Basics: Strategies for using your frame for summer propagation and fall starts. 

Whether you want to grow a sea of organic heirlooms or just want a safer way to get your tomatoes in the ground, this class will give you the technical skills to grow with confidence.

Plus, you’ll receive Mark’s Notes and Slideshow from the class!

Take the guesswork out of cold frames. Sign up today and learn how to build a foundation for your most successful garden yet!

Is this class available On Demand?

Not yet...it's on our to-do list to get it live by the end of January 2026.