Mongolian Lime As lime trees go, this is one of the most beautiful. Its small but beautifully edged Ivy-like leaves are delicately held on its branches. It is known for flowering at a young age (approx. 10 years). It's becoming a popular street tree, and of course a specimen tree for medium to larger gardens. Only first cultivated in the late 1800s. Site: Requires shelter from coastal windsSoil: Prefers well-drainedPosition: Full sunSeason of Interest: Summer flowering, Autumn colourHardiness: Hardy Height: 60ft (18m) Spread: 40ft (12m) in approx 40-50 years