Using a wider spacing between the seedlings is a good idea to allow for the plants to develop as much caliper as possible to evaluate hardiness. To germinate the seeds: treat like other brassicas, plant after danger of frost and lightly cover the seeds. This method of storage is for only short periods of time.ΔΆ0 Seeds Included of Outdoor Selections: Minus 20 F hardy. They come in a lightly moist paper towel. When you get your cuttings, they can be refrigerated until you are ready for rooting. Cuttings do not need additional rooting compounds to root. To Root the Cuttings: Cuttings can be stuck into a normal peat moss perlite mixture. The seedlings from this strain are more resistant to cold than the original seed source as it is hybridized with other hardy brassicas in my collection. Seeds of this selection will be included with your order for you to experiment with and develop your own varieties. Some parts of them sometimes die back to the ground only to resprout from the root or crown. So far our 'Michigan' plants are now over 10 years old. The plants will sprout from below the ground and develop a tree type physiology with thick stems on the older portions of the plants as they mature into their third and fourth years. These selections have one thing in common: extreme root hardiness and woody older stems that resist extreme cold temperatures. 'Michigan' also produces some seeds too and this could be an avenue to develop even more zone 5 hardy brassica varieties. Finally after several minus 20 F winters outdoors, this seedling was named and distributed. I made cuttings from this vigorous selection. From these three plants, one had grown 5 ft. It was a rare find in that the minus 17 F winter destroyed all the exposed outdoor seedling plants except three. This selection was found as a chance seedling out of 400 plants grown from The Tree Collard Project in California. Imagine growing a tree type brassica able to produce lots of delicious greens each year increasing in size and durability to drought and cold. 'Michigan' tree collards adds to this ease and joy of one of the most well known perennial vegetables. Sold out but Available from Project Tree Collards, California.
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