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Master Gardener Education February 22, 2010

Cacti & Succulents in the Garden. A Guide to Selecting, Growing and Enjoying Agaves. Master Gardener Education February 22, 2010. Jack Kelly University of Arizona College of Agriculture and Life Sciences Pima County Cooperative Extension Tucson, Arizona Jackelly@ag.arizona.edu.

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Master Gardener Education February 22, 2010

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  1. Cacti & Succulents in the Garden A Guide to Selecting, Growing and Enjoying Agaves Master Gardener Education February 22, 2010 Jack Kelly University of Arizona College of Agriculture and Life Sciences Pima County Cooperative Extension Tucson, Arizona Jackelly@ag.arizona.edu

  2. Cactus Flowers

  3. Cactus True cacti are succulents and are native to the Western Hemisphere. • They do not always have spines • True cacti have areoles, small nubbin- like structures found on the body of the cactus • The spines, flowers, and roots develop from areoles

  4. Leaf Leaf Succulent (Haworthia truncata) Root tuber Transparent ‘windows’ allow light to reach the bottom base of the leaf Roots

  5. Trichome Areole Spine (modified leaf) Tubercle Waxy Cuticle Water storing parenchyma cells Vascular cylinder Stem Succulent Golden Barrel Cactus Echinocactus grunsonii)

  6. Container Growing • Choose appropriate varieties that will not outgrow the container quickly • Use a soil mix that drains quickly, use clay pots • Use slow release fertilizers (Osmocote) or a soluble fertilizer such as Peter’s, Miracle-Gro, etc • Underpot to aid in soil drying between waterings

  7. Choose ‘ideal’ location in partial sun to place the container • Plant slightly high in container with lower leaves above the soil line • Repot every 3 - 4 years

  8. Agave, Cactus, add Succulent Basics Plant in well-draining soil Provide adequate light - many species prefer partial sun or filtered light Carefully choose a micro-climate Best when planted during warm weather to aid in root development Use organic amendments carefully - too much can interfere with proper drainage and lead to rotting Protect from direct sun when planting nursery grown plants. Plant at the same orientation as grown in nursery Know the mature size of the plant and space accordingly

  9. Be aware of spines especially in areas of pedestrian traffic Remove any damaged roots from field grown plants and allow to dry for several days in the shade Plant in a shallow wide hole with a minimum of organic amendment in the backfill Water thoroughly after planting and determine the irrigation schedule Do not use organic mulches; use decomposed granite or rock Keep water off of wide-leaved species and agaves to prevent spotting of the foliage

  10. Saguaro • Saguaro is our State Flower • Symbol of the Sonoran Desert • Home for many birds

  11. Ocotillo

  12. Boojum tree (Idria columnaris) This unusual plant is closely related to our native Ocotillo and is native to Baja California. It is rare, slow-growing, and therefore expensive. It makes a very nice addition to any collection and is now being grown by several nurseries in the Tucson area.

  13. Cactus

  14. Cactus

  15. Problems of Indoor Cactus and Succulents Mealy Bugs - Treat with a swab/paintbrush dipped in alcohol or handpick Spider Mites - Wash plant every 5-7 days with a strong stream of water or use a miticide at the same interval Scale - Scrape off individual scales or treat with a systemic insecticide

  16. Credits • Desert Plants, published by the Boyce Thompson Arboretum, Superior, Arizona • Mary Olsen, Associate Plant Pathology Specialist, University of Arizona • Greg Corman, Gardening Insights, Tucson, Arizona • Gregg Starr, Starr Nursery, Tucson, Arizona ***************** • Special Thanks to Bach’s Greenhouse Cactus Nursery, Tucson, Arizona

  17. Questions Questions,Comments?

  18. Issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914 in cooperation with the U.S. Department of Agriculture, James A. Christenson, Director, Cooperative Extension, College of Agriculture & Life Sciences, The University of Arizona. The University of Arizona is an equal opportunity, affirmative action institution. The University does not discriminate on the basis of race, color, religion, sex, national origin, age, disability, veteran status, or sexual orientation in its programs and activities. Persons with a disability may request a reasonable accommodation, such as a sign language interpreter, by contacting DRC (Disability Resource Center) at 621-3268 (V/TTY). Requests should be made as early as possible to allow time to arrange the accommodation.

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