09/10/2026
Roost harvest season has begun 🌿
Each plant part we use for medicine, bark, leaf, flower, seed and root, has an optimal harvest window during the growing season. The harvest window is when the medicinal properties in that part of the plant are at their peak. Knowing these harvest times is one of the secrets to making potent herbal medicines.
And as summer begins to give way to fall, our attention starts moving underground.
For many perennial medicinal plants, the best time to harvest their roots is during dormancy, after the above-ground growth begins to die back in the fall and before new growth begins again in spring. At this point, the plant has finished flowering and setting seed and has moved its resources back underground to sustain it through the winter.
But the best time to dig depends on the plant. Biennials such as burdock and mullein are generally harvested in the fall of their first year, before they use those stored reserves to flower and set seed the following season. Perennial roots are often allowed to grow for several years before their first harvest.
Here on Vancouver Island, our root harvest usually begins in September, once the autumn rains have softened the earth and the garden begins to settle into fall.
Root harvesting is one of my favourite parts of the growing season. There is digging and prying, shaking off soil, washing, scrubbing, chopping and processing, and with many perennial medicines, dividing and replanting the crowns so they can continue growing for years to come.
I’ve put together a full guide to harvesting medicinal roots on the blog, including when to harvest annuals, biennials and perennials, how to dig and clean different kinds of roots, and how to dry, store and make medicine with your harvest. You’ll find Underground Apothecary: A Guide to Harvesting Root Medicines here https://ravensongherbals.com/blog-post/underground-apothecary
And because medicinal plants look very different once you get below ground…
How many of these 10 medicinal roots can you identify? 👀🌿
Swipe through and leave your guesses below. Bonus points if you can name all ten.