Scott Kunst, owner of Old House Gardens in Ann Arbor, Mich., will give a lecture, "Antique Gardens -- American Home Landscapes, 1800-1940," at 7 p.m. Tuesday at the Frick Art and Historical Center, 7727 Reynolds St., Point Breeze.

Mr. Kunst will discuss early use of bulbs then focus on heirloom bulbs that can be grown today, including wild lilies and glads, Colonial daffodils, Aztec tuberoses and Victorian dahlias.

Cost is $8 for Frick members, teachers, students, and members of the Twentieth Century Club; $10 for nonmembers and guests. Information: www.frickart.org/programs/lectures/.

For the first time in eight years, demand was so great that we've run out of seeds for the 'Limbaugh Legacy Potato Top' tomato. It usually takes about an hour for Penn Hebron Garden Club members to fill self-addressed, stamped envelopes with seeds from the heirloom renamed for the late Fred Limbaugh. This year, they filled envelopes for four hours and ran out. If you have some 'Potato Top' seeds, please send them to the address below so we can fill the remaining orders:

The Pennsylvania Resources Council will continue a series of rain barrel workshops. Experts will discuss how to collect and use rainwater while also reducing runoff. The cost -- $30 per person, $40 per couple -- includes hardware (not the drum) to assemble a 55-gallon rain barrel. Here's the schedule:

• 7 p.m. Tuesday at Green Tree Fire Hall, 833 Poplar St.
• 11 a.m. April 12 at Boyd Community Center, 1220 Powers Run Road, O'Hara.
• 6:30 p.m. April 16 at East End Food Co-op, 7516 Meade St., Point Breeze.
• 6:30 p.m. April 24 at Forest Hills/Westinghouse Lodge, 700 Barclay Ave.
• 7 p.m. May 15 at Whole Foods Market, 5880 Centre Ave., East Liberty.

Information, registration: Nancy at 412-431-4449, ext. 247, or www.prc.org.

Old Economy Village in Ambridge will host a spring garden workshop, "Gardens of Pennsylvania," on April 12. The program will showcase speakers from five historic gardens: Hershey's Rose Garden, Bartrams Garden, Longwood Gardens, Bowman's Hill Wildflower Preserve and Old Economy. The workshop, which runs from 9 a.m. to 3 p.m. is $75 per person and includes a box lunch. Post-Gazette readers will receive a $10 discount if they mention they saw this announcement. For more information or to register, call 724-266-4500, ext. 101.

Boyd Community Center in O'Hara will be the site of several classes this spring. Each begins at 6:30 p.m. and carries a fee of $16. Here is the schedule:

• April 2: "Annuals, Perennials and Biennials."
• April 23: "Frugal Gardening."
• May 7: "Container Gardens."

Information, registration: 412-828-8566, ext. 11.

It's time for the Botanic Garden of Western Pennsylvania's sale of unusual perennials, shrubs, vines and trees, all suited for our zone.

Plants must be pre-ordered, but some can also be purchased on pick-up day, May 17 from 8 a.m. to 2 p.m. at the Green Tree Fire Hall & Community Center, 833 Poplar St.

To see catalog descriptions and photos, go to www. botanicgardenwpa.org. To receive a printed catalog or place an order, call 412-444-4464. Deadline for orders is April 15.

Pittsburgh Stone and Waterscape will hold a Landscape Tour on May 3 with proceeds benefiting the Cystic Fibrosis Foundation. Participants will tour 10 sites in the South Hills, ending with the Pletcher home in Nevillewood, which was featured in the Post-Gazette and on HGTV.

Cost is $25 per person and tickets will be available at the Pittsburgh Stone and Waterscape booth at the Pittsburgh Home & Garden Show. Information, tickets: 412-833-5838 or www.pghsw.com.

Victoria's birthday party

The Allegheny West Historic District will celebrate Queen Victoria's birthday on May 17 and 18 with an English high tea and a presentation, "How to Create an English Garden."

The event will be held in restored homes in the historic neighborhood beginning at 2:30 p.m. each day. Garden designer Carol Churnega will give the lecture, and Linda Iannotta will cater the event. Tickets are $40 per person and are limited. Information: 412-323-8884 or www.alleghenywest.info.

Gardenline hours

Gardenline, the garden hot line for Penn State Cooperative Extension of Allegheny County, has new hours of operation. Beginning this month and continuing through Oct. 30, Penn State Master Gardener volunteers will respond to gardening inquiries by walk-ins, phone and e-mail from 9:30 a.m. to 12:30 p.m. Monday through Thursday. The phone numbers are 412-473-2600 or 2601, e-mail address is alleghenymg@psu.edu and office address is 400 N. Lexington St., Point Breeze.

Nursery, garden tour

Penn State Cooperative Extension Service and Phipps Garden Center are co-sponsoring a tour to Eastern Pennsylvania and New Jersey on June 2-3. The tour will include the Scott Arboretum at Swarthmore College, Russell Gardens, RareFind Nursery, Pleasant Run Nursery and several private gardens. Hosts will be horticulturists Nancy Knauss and Mike Masiuk.

Fee for the trip is $375. Lunch and dinner on both days are provided. Information: 412-441-4442, ext. 3925.