10 Honeylocust Tree Seeds (Gleditsia caspian), FAST GROWING, Free Shipping Other Names: Persian Honeylocust, Gleditsia triacanthos var. inermis 'Caspian' Grow Zones: 4,5,6,7,8,9 Honeylocust Caspian Trees, also known as Gleditsia triacanthos var. inermis 'Caspian', are a type of fast-growing tree that are perfect for any rock garden or any landscaping project. These trees are known for their impressive growth rate and hardiness, making them a great option for those looking to add some greenery to their landscape quickly. These trees can grow up to 3 feet per year, which means that they can reach their mature height of 30-40 feet in just 10-15 years. This makes them an ideal choice for those who want to create a lush, mature landscape in a relatively short period of time. In addition to their fast growth rate, Honeylocust Caspian Trees are also known for their hardiness. They are able to tolerate a wide range of soil conditions and are resistant to many common tree diseases. This makes them a low-maintenance option for any rock garden or landscape, as they require minimal care to thrive.