Back in the early 2000s, we grew the spiral ginger, Costus speciosus for many years, before finally loosing it in a very cold winter, but its potential hardiness has always fascinated us. In 2013, Georgia plantsman Ozzie Johnson collected a specimen near the border of North Vietnam and Southern China at 3,900′ elevation. Below is Ozzie’s collection this week at JLBG, after our recent winter of 11 degrees F. The same plant, growing in Atlanta, survived 5 degrees F this winter without protection, so I think we can safely say we have a Zone 7b hardy form. This exceptional clone has been named Costus speciosus ‘Wizard of Oz’. It will take a few years to build up stock, but we’ll get this one ready as fast as possible.
We were thrilled to see that our Euonymus myrianthus sailed through our recent cold snap. This fascinating species was first introduced to Western horticulture by renown plant explorer, Ernest Wilson in 1908, and has been quite slow to get around. Recent collections have finally made this available for trial in the US.
This small evergreen tree matures at 12-15′ tall, adorned with a show of bright orange fruit. We have tried a couple of collections, but this recent one from a Dan Hinkley, Ozzie Johnson, Scott McMahon collection is thriving for us. Hardiness is unsure, we we expect it will be fine from Zone 7a and south.