The Friends of the UC Davis Arboretum have put their green thumbs to work on the number of fall plant sales: This year there will be two instead of one.

Also, the Davis Botanical Society, which supports the UC Davis Botanical Conservatory, is holding its annual “presale.” It is called that because it comes the day before one of the arboretum plant sales.

“The presale offers a wonderful assortment of lesser known plants that are called indoor and tender outdoor plants (tender and somewhat cold tolerant to completely cold-tolerant), including succulents, carnivorous plants, great house and patio plants, as well as orchids,” said Ernesto Sandoval, the conservatory’s director.

“Between the conservatory and the arboretum, we have one of the best sets of plant sales in California as far as diversity and quantity are concerned.”

BOTANICAL CONSERVATORY

Presale, Oct. 2 — 10 a.m.-1 p.m., parking Lot 27, adjacent to the conservatory near the east end of Kleiber Hall Drive.

ARBORETUM

35th annual Plant Faire, Oct. 3 — With music and children’s activities. Members-only sale, 9-11 a.m., for members of Friends of the UC Davis Arboretum and the Davis Botanical Society; and public sale, 11 a.m.-1 p.m.

This sale offers your first chance of the season to buy Arboretum All-Stars and pollenator plants, or any of the arboretum’s hundreds of varieties of other great plants for Central Valley gardens.

Not a member? You can join at the gate, and thereby gain access to the members-only sale. Members receive a 10 percent discount, and every new member receives a free plant.

Plant Sale and Warren Roberts Retirement Reception, Oct. 17 — 9 a.m.–1 p.m., featuring a group of “Warren’s Favorites,” great for home landscapes, with the plants selected by the arboretum superintendent, who is retiring after 37 years with the arboretum. Members receive a 10 percent discount; every new member receives a free plant.

The sales take place at the Arboretum Teaching Nursery on Garrod Drive south of La Rue Road. The nursery is just beyond the Unitrans bus yard and across from the School of Veterinary Medicine. Parking is free.