An annual series of lectures held from late fall to early spring that explore a wide variety of fascinating topics. Lectures are supported in part by the Klein Lecture Endowment given in memory of Dr. William M. Klein who served from 1977-1990 as the Arboretum’s first full-time director, the Laura L. Barnes Lecture Endowment of The Philadelphia Foundation, given in memory of Laura Barnes by students and alumni of her school of horticulture, and the Byron Lukens Lecture Endowment, given in memory of educator and Arboretum volunteer, Byron Lukens and his wife Elizabeth.
Due to the heat, Grist Mill Demonstration Day, on July 21st, has been cancelled.
The Garden Railway will not be operational from 2:00 PM Friday (July 19) through the weekend (July 20-21). The trains will open for normal operation on Monday, July 22nd. Our Train Master reported that the trains will not operate in the excessive heat, citing electrical, track and rolling stock failures.
The Arboretum is open as usual. Click here for hours.
Garden Railway trains are not running Saturday, September 8th and Sunday, September 9th due to inclement weather.
Please note: The Rose Garden is closed for maintenance every Thursday morning until noon.
Weather conditions may limit garden access to certain features even if the garden is open – please check the web site or call (215) 247-5777 for updates before visiting. Our visitors’ safety in the garden is our top priority. Therefore when inclement weather is predicted, we will make decisions about closing the garden accordingly.