Division II.A: Horticulture

Please carefully read and follow the MFAH Rules, GCA Rules, General Information, Division Guidelines, and Timetable for Exhibitors.

Ownership Requirements

1. Entries must have been owned and grown by the exhibitor for a minimum of six months (October 16, 2018), unless otherwise stated in this schedule. Exceptions are as follows:

  • Classes 13–16, Class 27, Classes 30–32; three-month ownership, January 16, 2019
  • Classes 33–35; nine-month ownership, July 16, 2018
  • Classes 36–46 and Class 49; one-year ownership, April 16, 2018
  • Class 70; Provisional Challenge is excluded from the six-month
    ownership requirement.

2. An exhibitor is permitted up to three entries per class, provided each is a different species or different cultivar.

Plant/Specimen Requirements

3. The maximum length of an entered cut specimen is 26” measured from the lip of the container to the end of the vine, branch, or leaf, unless otherwise specified in the class description. Exceptions apply to: Classes 6, 24, and 30–32 may not exceed 34”.

4. All cut specimens must be in show condition at the time of judging. Wilted specimens are subject to removal by the Horticulture Committee. See GCA Rules #4, regarding condition of plant material.

5. Leaf polish or other commercial foliage enhancers are not permitted.

Container Requirements

6. Containers and wedging materials will be provided for all cut specimens, with the exception of classes 6, and 30–32.

7. Containers are measured at the diameter or the diagonal of the widest point on the inside of the rim at the soil line. Containers may not exceed 10”. Exceptions apply to:

  • Classes 45, 55, 60, and 61 not to exceed 8”
  • Classes 38, 46, 62–65, and 77 not to exceed 14”.

8. Container grown plants should be exhibited in terra cotta clay pots that are clean. Disguised double-potting and top dressing are permitted. Plastic pots, if used, must be double potted inside a terra cotta clay pot. Top dressing must not float when watered. Sphagnum moss and Spanish moss are not permitted as a top dressing.

9. To designate a preferred exhibiting side, exhibitors must mark the center back of the container with a white chalk mark “X”.

10. Mats, stands and saucers are not allowed. If an entry is staked (such as a forced bulb or orchid), the support must be as unobtrusive as possible.

Entry Cards

11. Entry cards are available for download at flohouston.wpengine.com, from the Division Chairs or the Horticulture Committee in advance of the show, and at the show.

12. An entry card must include the name of the exhibitor, division, class, botanical an common names, length of ownership, and if applicable, propagation method and relevant dates of propagation. Entry card and key card must be printed (by hand or computer) in black waterproof medium. Entry cards printed from flohouston.wpengine.com should be printed on white cardstock.

13. A key card (diagram or plant list) is required when multiple species or cultivars are exhibited in the same container, a collection of containers, and/or propagation information is applicable. Entry card and key card must be printed (by hand or computer) in black waterproof medium. A 4” x 6” photograph with identifying marks may be used to supplement the white card.

14. Entries eligible for the Elizabeth Platt Corning Medal and/or the Louise Agee Wrinkle Horticulture Propagation Award must have been grown by and in the possession of the exhibitor for at least six months (October 16, 2018) and will be identified by a check mark on the entry card. Plants grown using sustainable practices, and those eligible for the Novice Award will also be identified by a check mark on the entry card.

Entry Process

15. Only GCA club members, Museum personnel, and plant experts approved by the Horticulture Division Chairs may be in the passing area of the Show. Only GCA club members may participate in the entry process. Each exhibitor bears the ultimate responsibility for their own entry.

16. Plant Inspection is the first station in the physical entry process. Plant Inspection closes at 9:00 a.m. on Tuesday, April 16, and no entries will be accepted at Plant Inspection after 9:oo a.m. Any entry presented at Plant Inspection after 9:00 a.m. may not be entered into the show.

17. A dot with the entry number will be affixed to the container, to the entry card, and to the key card (if applicable) in order to ensure accurate staging and judging.

18. Once an entry has been passed, it may not be touched by anyone other than the Placement Committee, the Horticulture Chairs, the Show Chairs, or the Clerks.

19. Classes may be subdivided and entries moved and/or reclassified at the discretion of the Horticulture Committee, the Show Chairs, and/or the Judges.


20. Entries will be judged for horticulture achievement and conformance to schedule. For the scale of points for Horticulture, please refer to the GCA Flower Show and Judging Guide Chapter V, Section XIII, or follow the link at flohouston.wpengine.com.


21. All entries must be removed on Wednesday, April 17, 2019, between 5:15–6:00 p.m. At 6:00 p.m., horticulture cut specimens, member challenge entries, and Provisional challenge entries will be discarded if not removed by the exhibitor.


By e-mail at any time. By telephone weekdays, 9:00 a.m.– 5:00 p.m. Central Time.

Margaret Piercemargaret.m.pierce@icloud.com, 713-854-8049

Marilyn Gregg, mmgregg@att.net, 713-553-3616