Jenkins Arboretum in Devon closed at the end of business on Sunday and will remain closed into next year, so that its education center can be rebuilt.
"We are going to reopen when construction is finished," said Arboretum spokeswoman Janet O'Leary, "hoping it will be spring 2009."
That would be in time for what she called a "bloom festival . . . mid-April to the end of May."
The 46-acre arboretum, divided by Route 252, is on Berwyn Baptist Road between Routes 30 and 202 in Tredyffrin Township.
It includes the former houses of the Jenkins and Browning families, O'Leary said, a greenhouse and the education center, built in the 1970s.
The education center "is outgrown and outdated," according to an arboretum statement. "To meet the demands of the future in terms of energy conservation and environmental education, the renovation is imperative."
The arboretum is a not-for-profit organization. Before it shut down for the construction work, it was open daily, free of charge, from 8 a.m. to sundown.
Walter F. Naedele