Answer: Thuja 'Green Giant' is one of the fastest growing of all Conifers. This very rare hybrid between Western Red Cedar plicata and Thuja Standishii Cedar will put on 3 to 5 feet of growth per year. Elegant and uniform, Green Giant's conical habit needs no shearing or pruning, and is cloaked in dense, dark, evergreen foliage clear to the ground - a stunning choice for a private screen. This is a tough, easy plant to grow, tolerating almost any soil and resistant to damage from ice and snow. Green Giant is able to withstand drought well, exhibiting no significant pest or disease problems, and is highly deer and bagworm resistant.
You didn't mention when you planted your Green Giants, but if it was recently, they may just need to establish their root systems before they're ready to grow. It's too late in the season to fertilize now. Wait until next spring and then apply fertilizer (use one made especially for conifers and apply at rates as recommended on the label).
I'm sure your plants will take off next spring. Enjoy!
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