Can I say,<br/><br/>(a) It has a lifespan<u> up to 50 years.</u> / has a lifespan<u> of up to 50 years</u>. <br/><br/>(b) It grows <u>to a length</u> 2 to 3 metres / grows to <u>a length of </u>2 to 3 <u>metre long</u>.