Tiptoe through the tulips…or whatever plants are in bloom at Castle Hill in Ipswich. Crane horticulturalist Beth Walsh leads visitors on an August 10 walking tour of the grounds beginning at 10:30 am, including the woodland path, Italian Garden, and Rose Garden. Learn about what’s in bloom and what it takes to keep these restored gardens historically appropriate to the original landscape design and adaptable to modern usage. Trustees members $12, nonmembers $20. Register at www.thetrustees.org, or call 978-356-4351, x 4015.