Project Tree Collard introduced the Big Blue Tree Collard Plant to the public in 2020. It is a naturally occurring garden hybrid that appears to be a cross between the Merritt Tree Collard, Dinosaur Tree Collard, and the Purple Tree Collard.
Big Blue Tree Collards grow 3-5 feet in height as a mid-sized multi-trunked shrub. Within the first year or two, stalks can reach an inch in diameter. Once this tree collard reaches 2-3 feet in height, it would benefit from the support of a sturdy stake as it can be top heavy in storms and high winds. Leaves can get up to 1 1/2 feet long and are a stunning blue-green color with a hint of pink/purple in the stems. They are crinkly like Dinosaur Tree Collards, but much wider and less linear. In the cool season, leaves and stems may turn pale purple and become much sweeter.
Big Blue Tree Collards are hardy in USDA zones 8-11 and probably marginal in zones 7A and 7B. So far it has done well in snow and temperatures down to 28 degrees. Because it is a relatively new introduction, at this time it’s exact cold hardiness is unknown and we are collecting customer data. It has been very heat tolerant in dry California summers up to 112 degrees.
These seeds will NOT be true to type (identical to the parent plant) due to cross-pollination with other brassicas on the farm. If you want to grow Big Blue Tree Collards identical to the ones we sell, please purchase cuttings or rooted plants. (they are not always in stock since we don’t propagate or take cuttings while they are flowering).
This seed will likely produce vigorous, leafy brassica plants that are of interest to plant breeding enthusiasts. They flower at the same time as our other collards so they will produce some interesting crosses. These tree collard seedlings will be more climate adapted than the parent plants.
Please send a message if you wish to have seeds shipped internationally and let us know your order. We will send you a Paypal Invoice. Unfortunately we cannot guarantee delivery for international orders. Please do your research beforehand to see if customs is likely to confiscate your items. We have successfully shipped to Australia, parts of Asia, parts of Africa, Europe, and Canada, in a regular letter envelope ($10).