Having been raised in a sheltered or overly protected environment; often used figuratively for someone inexperienced, delicate, or naïve.
彼は温室育ちだから、少しのトラブルですぐに動揺する。
He was raised in a sheltered environment, so he gets upset at minor troubles.
温室育ちの若者が社会に出て苦労するケースもある。
There are cases where youngsters raised in sheltered conditions struggle when they enter society.
彼女の言動は温室育ちを連想させるが、努力家でもある。
Her behavior suggests a sheltered upbringing, but she is also hardworking.