Old Westbury Garden's annual spring plant sale and gardening weekend runs Friday through Sunday (April 30-May 2) from 10 a.m. to 5 p.m. daily.

Annuals and perennials, many of which are Old Westbury Gardens’ signature varieties, will be on sale and its horticulturalists, Cornell Cooperative Extension of Nassau County master gardeners and members of the American Rhododendron Society will be on hand to help you select the right plants for your gardens and answer your questions. Gardening workshops and presentations will run on Saturday and Sunday from 1 to 3 p.m.

Stuff for the kiddies, too, like a "Tre-mendous celebration," during which kids of all ages can spend a few hours learning about trees. Highlights include the basics of tree biology and a tree identification tour. Free tree seedlings, crafts and more. The event is from 11 a.m. to  3 p.m., May 1 and 2.

If you'd like a soil test (which I highly recommend), bring 1/2 cup of dry soil. 

Some new plant selections for sale will include a black nasturtium, a midnight-blue love-in-a-midst, two more forget-me-nots and kiss-me-over-the-garden-gates, a new group of sweet peas, including a blush pink named "Mollie Rilestone," and a wide assortment of shade perennials, including a new black aquilegia named "Black Barlow," a number of cimicifuga, and a mix of plants with long bloom times and interesting characteristics, like a golden yellow Brunnera.

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Admission: $10 general, $8 seniors (over 62), $5 children 7 to 12, and free for children 6 and under and Old Westbury Gardens members.

Details: 516-333-0048 or www.oldwestburygardens.org