From the U.S. Postal Service announcement on October 22, 2019:

The Postal Service introduces Garden Corsage, a new 2-ounce stamp. This stamp can accommodate the weight of heavy invitations for birthdays, weddings, anniversaries and other celebrations, oversize greeting cards for all occasions, and mailings such as small gifts that require extra postage. The stamp features a photograph of a corsage containing a spray of peach roses and a pink ranunculus, accented with deep-pink heather and seeded eucalyptus. A cream-colored lace ribbon entwines the flowers. Garden Corsage is similar in design to the Contemporary Boutonniere Forever stamp, and the two form a natural pair. The corsage was arranged by floral designer Carol Caggiano and photographed by Renée Comet. Art director Ethel Kessler designed the stamp.

Additional information will be posted below the line, with the most recent at the top.

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This stamp was issued Thursday, April 2nd, in Crestwood, Kentucky.

The Scott Catalogue number for this issue is 5458.

Updated April 16th:
Here are the first-day cancels for this issue:The Digital Color Postmark measures 2.85″ x 1.38″ The pictorial postmark measures 2.64″ x 0.95″

Updated March 23rd:
The first-day ceremony for this stamp has been canceled. The stamp will still be issued on April 2nd. More details will be announced closer to the issue date.

Updated March 12th:
Technical Specifications:

Issue: Garden Corsage Stamp
Item Number: 585900
Denomination & Type of Issue: 2-Ounce Rate, Non-denominated, Mail Use
Format: Pane of 20 (1 design)
Series: N/A
Issue Date & City: April 2, 2020, Crestwood, KY 40014
Art Director: Ethel Kessler, Bethesda, MD
Designer: Ethel Kessler, Bethesda, MD
Typographer: Ethel Kessler, Bethesda, MD
Photographer Renée Comet, Washington, DC
Modeler: Joseph Sheeran
Manufacturing Process: Offset, Microprint
Printer: Ashton Potter (USA) Ltd. (APU)
Press Type: Muller A76
Stamps per Pane: 20
Print Quantity: 45,000,000 stamps
Paper Type: Nonphosphored Type III, Block Tag
Adhesive Type: Pressure-sensitive
Processed at: Ashton Potter (USA) Ltd. (APU)
Stamp Orientation: Horizontal
Image Area (w x h): 1.05 x 0.77 in./26.67 x 19.558 mm
Stamp Size (w x h): 1.19 x 0.91 in./30.226 x 23.114 mm
Full Pane Size (w x h): 5.76 x 5.55 in./146.304 x 140.97 mm
Colors: Black, Cyan, Magenta, Yellow, PMS Cool Gray 7 C
Plate Size: 320 stamps per revolution
Plate Numbers: “P” followed by five (5) single digits in four corners
Marginal Markings: Plate position diagram (8) • 2 Barcodes (585900) • ©2019 USPS • USPS logo • Promotional text

Updated March 6th:
Here are the first-day cancels for this issue:The Digital Color Postmark measures 2.72″ x 1.41″ The pictorial measures 2.39″ x 1.22″

Updated March 4th:
[press release]
Save the Date: Boutonniere and Corsage Stamps Arrive in April
New Stamps Perfect for Mailing Wedding and Other Invitations

WHAT: The U.S. Postal Service introduces two stamps for many of life’s special moments. The Contemporary Boutonniere Forever stamp and the Garden Corsage 2-ounce stamp form a natural pair.

The first-day-of-issue event for these stamps is free and open to the public. News of the stamps is being shared with the hashtags #BoutonniereStamp and #CorsageStamp.

WHO: David E. Williams, chief operating officer and executive vice president, U.S. Postal Service

WHEN: Thursday, April 2, 2020, at 11 a.m. ET

WHERE:
Yew Dell Botanical Gardens
6220 Old LaGrange Road
Crestwood, KY 40014

RSVP: Dedication ceremony attendees are encouraged to RSVP at www.usps.com/boutonnierecorsage.

Background: These new stamps reflect the organic style popular for today’s floral designs. Photographs of a boutonniere and corsage were used as the artwork for these chic stamps.

The Contemporary Boutonniere stamp is well suited for RSVP envelopes included inside wedding invitations. It is also a perfect touch for thank-you notes and announcements, in addition to regular correspondence. The 2-ounce Garden Corsage stamp can accommodate the weight of heavy invitations, oversize greeting cards, and mailings that require extra postage.

The flower arrangements in both of these designs create beautiful botanical presentations.

Customers may purchase stamps and other philatelic products through the Postal Store at usps.com/shop, by calling 800-STAMP24 (800-782-6724), by mail through USA Philatelic or at Post Office locations nationwide.

Updated February 27th:

On April 2, 2020, in Crestwood, KY, the United States Postal Service® will issue the Garden Corsage stamp (Non-denominated priced at the 2-ounce rate) in one design, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 585900). The stamp will go on sale nationwide April 2, 2020, and must not be sold or canceled before the first-day-of-issue.

The United States Postal Service introduces Garden Corsage, a new 2-ounce stamp for all of life’s special moments. This stamp can accommodate the weight of:

• Heavy invitations for birthdays, weddings, anniversaries, and other celebrations;
• Oversize greeting cards for all occasions; and
• Mailing small gifts that require extra postage.

The stamp art features a photograph of a corsage containing a spray of peach roses and a pink ranunculus, accented with deep-pink heather and seeded eucalyptus. A cream-colored lace ribbon entwines the flowers. Garden Corsage is similar in design to the Contemporary Boutonniere Forever stamp, and the two form a natural pair. The corsage was arranged by floral designer Carol Caggiano, and photographed by Renée Comet. Art director Ethel Kessler designed the stamp.

No automatic distribution to post offices.

How to Order the First-Day-of-Issue-Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at usps.com/shop. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

FDOI – Garden Corsage Stamp
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

After applying the first-day-of-issue postmark, the Postal Service™ will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by August 2, 2020.

Technical Specifications are not yet available.

Updated February 25th:
The first-day ceremony will be held at 11 a.m. at Yew Dell Botanical Gardens, 6220 Old LaGrange Road in Crestwood.

You can reserve a space here.