New Zealand Click to see full answer. Consequently, where does the manuka tree grow?Commonly called tea trees, manuka trees (Leptospermum scoparium) occur naturally in Australia and are widely cultivated within U.S. Department of Agriculture hardiness zones 9 and 11.Also, how long does a manuka tree take to grow? Manuka grows best on marginal hill land, and has the benefit of acting as erosion control while producing a crop. It was also a long term investment, with the return not showing up until 10 years after planting. Manuka begins flowering in years four and five, but it takes six years to reach full production. Likewise, can you grow manuka trees in the US? Manuka trees (Leptospermum scoparium) are native to New Zealand. In the spring, manuka trees bloom with a profusion of white, pink or reddish flowers. These temperate climate plants cannot tolerate sustained freezes and only grow well in U.S. Department of Agriculture plant hardiness zones 9 and 10.Can the Manuka bush grow in the UK?Tregothnan is the only place outside of New Zealand that produces Manuka honey. Native to New Zealand, Manuka grows wild much like gorse does here in the UK. In the UK however, Manuka has only been cultivated since 1880. The manuka bush, has been grown at Tregothnan since the 19th Century.