Yavapai Gardens
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University of Arizona Yavapai County Cooperative Extension Yavapai Gardens Master Gardener Newsletter April 2004 Zinnias by Nora Graf Events & Activities MG Association Meeting, Wednes- One of the unsung heroes of the summer day, April 20 6:30pm, Prescott. The garden is the zinnia. In a world domi- speaker will be Betty Billingsly-”Judging nated by masses of 6-packs of petunias, at the Fair” marigolds and salvias the zinnia is lim- ited to a mere flat or two pushed into a Yavapai Rose Society - ,April 18 2:30pm back corner of the garden center. Why? Special tour of Willow Creek Nursery. 1670 E. Zinnias come in a wide range of colors, Perkinsville Rd. For more information 928- shapes and sizes, so it can’t be that. They 771-9300. bloom and grow in very hot weather, so that’s not the reason. The Alta Vista Gardening Club, Prescott, fourth reason is they don’t tolerate modern commercial greenhouse condi- Tuesday of the month, 12:30pm. Call 928- tions and growing techniques. Zinnias are not fond of getting their 443-0464 for location and information. leaves wet and most commercial greenhouses use overhead sprin- klers. Nor do they like their roots disturbed, so it’s tough to trans- Prescott Area Gourd Society, third Tuesday of plant them out of 6-packs. The good news is that you can toss out a the month, 6:30 pm, at the Smoki Museum. few handsful of seeds and have a great summer display. Pond Club -this is an informal group that Zinnias come in all styles: there are types that resemble spider meets every couple of months, usually the 3rd dahlias, others that are small pom- poms and there are tall varieties week. Email [email protected] and short ones for borders. All colors of the rainbow are represented, for more information. from whites, reds, yellows, purples, oranges and everything in be- The Organic Gardening Club meets on the tween. 3rd Saturday of the month, 2215 E. Aspen St, The flowers are native to southwestern US, Mexico and Cen- 3pm. For directions call 928-649-3451. tral America. It was the Spanish who first sent them to Europe. These species were small and the Spanish considered them ugly; they Prescott Orchid Society, meets 3rd Sunday of even called them “mal de ojos,” loosely translated to “bad eye.” They the month, 1:30pm at the Prescott Library, call were cultivated in Austria in 1613. It was a medical professional that Cynthia for information. (928) 717-0623 gave the flower its name. Johann Gottfried Zinn was a professor at Gottingen University. He wrote a book on flora of the area and a Table of Contents book on the anatomy of the eye that was so accurate it is still valid today. Zinn died in 1759 but left behind the flower, zinnia, and a Zinnias . pg 1 description of part of the eye called Zinn’s Zonule. Water Testing . pg 3 The Victorian age was a great time for assigning flowers Seed Swap . pg 4 meaning. Zinnias generally mean “thoughts of an absent friend.” Meet a Master Gardener . pg 5 It went even further in that different colors had different meanings. Soil Session for 3rd Grade . pg 6 Magenta meant lasting affection, scarlet-constancy, white-goodness, Verde Valley Med Center . pg 6 yellow-daily remembrance. 1 Zinnias are members of the Asteraceae family (asters) zinnia, (Z. grandiflower.) The desert zinnia has white, sin- that were found from Colorado to Guatemala. It is now gle flowers and grows to about a foot tall. It blooms in the the state flower of Indiana for some reason, who knew! spring and summer and is now available commercially. I Today they are frequently grown (or should be!) in home found it available at High Country Gardens but have also gardens. They are also grown as cut flowers for com- seen it in nurseries in Phoenix. I t will grow in our area mercial sale. About 20 different species of zinnias are and is drought tolerant. The plains zinnia is similar, with recognized. Three species are now grown commercial- yellow flowers, but it is difficult to establish. ly: Zinnia elegans, (the common zinnia,) Z. haageana, Butterflies love zinnias and planting them in your (Mexican zinnia) and Z. augustifolia. garden will provide them with a feast. There are some Zinnia elegans is the most common one you will species they prefer over others, though. The variety “Cut find. All those packets of seeds on and Come Again” seems to be a fa- racks are likely to be elegans. The vorite. “Blue Point Formula Mix” species has been transformed into and “Royal Purple”, “Sunbow Mix”, a showy variety of flower types, Z. augustifolia “Crystal White” and sizes and colors. They come in ev- “Star White’ seem to be favorites but ery color except blue—even some you will have to experiment for what called “Candy Stripes”, which works best for your area. have stripes of colors on them. Zinnias are simple to grow and You will even find green zinnias. they love our conditions—hot, dry Two of the most popular shapes summers and low water. They easily are the Cactus type and the Dahlia become chloratic at temperatures be- type introduced by W. Atlee Bur- low 60°F. They prefer temperatures pee in the 1920’s. Cactus-flow- above 70°F. Plant seeds directly in ered varieties have twisted, tubu- the garden after danger of frost is lar or quilled double flowers up to over. They really look best if you 6 inches across. Dahlia-flowered plant masses of them, versus setting have broad, flat petals that are them in a row or individually. Thin doubled up to 6 inches across. You will also find small seedlings to 6-18 inches apart, depending on the variety. pompom varieties that are great border plants that grow You can start them inside in colder climates, but around 12 -15 inches tall. Look for “Thumbelina”, “Lilliput”, here I wouldn’t bother since they really don’t like their “Peter Pan”, and the Lollipop series. roots disturbed. Once the seeds germinate and leaves Zinnia haageana, the Mexican zinnia, is also la- have formed, give them a light application of fertilizer, beled as “old Mexico” or “Persian Carpet.” Colors usu- but, if they are in a good soil to begin with, they may not ally are red, yellow, orange and mahogany; sometimes need it. Vegetative growth happens when the days are different colors will appear in the same flower. long; flowers appear when the days start to shorten—un- Zinnia angustifolia (or Z. linearis) is a compact der 14 hours. Powdery mildew can be a serious problem type around 12 inches tall with one to two inch flowers, with zinnias and it can plague gardeners in the Midwest usually bright orange with a yellow midrib. This was a and South. While powdery mildew can be a problem in plant well known to the Aztecs. “Classic” and “Orange the monsoon season, I have yet to see it on the zinnias I Star” are two varieties. These are closer to the original have grown in Camp Verde. Keep their leaves dry—no species with single, daisy-like flowers. overhead watering; they thrive on drip systems. If you Another species you may come across are the have had a problem in the past there are some varieties Peruvian zinnias, Z. peruviana, which were a favorite of which are resistant. Try “Blue Point”, “Oklahoma”, “Pro- Thomas Jefferson. These have small 1-inch flowers that fusion” and the “Pinwheel” series. come in Red or Yellow. I’ve grown both of these plants Keep the blooms deadheaded to encourage a long and they are interesting but they can be a bit rangy and summer bloom. They should bloom until the first cold tall and reseed easily. The flowers fade to a paler color as weather knocks them out. They also make excellent cut they age and will dry on the stalk. flowers, so enjoy and bring some in the house. Two other species that are interesting are from Aside from powdery mildew, there are some dis- the Southwest: the desert zinnia, (Z. acerorsa) and plains eases and pests zinnias may be afflicted with. Thrips, 2 caterpillars (remember caterpillars can be butterflies and “Almost Free” Well Water Testing moths in waiting) and stem miners can infest the plants, for Private Well Owners although I have had few problems with mine. Diseases other than powdery mildew aren’t usually a problem in The Yavapai County Master Watershed Stewards and the our dry climate but can be infected via insects with vi- University of Arizona Cooperative Extension Office for ruses like Cucumber Mosaic Virus and Tomato Spotted Yavapai County is offering “Almost-Free” Well Water Wilt virus. Some types of nematodes may also be a prob- Testing for Private Well Owners. This 7th annual testing lem. program will be offered during National Drinking Water These are generally trouble-free, vibrant, excit- Week, May 2 - May 8, 2005. The deadline for kit reser- ing flowers to brighten up the summer garden. If you vations is April 15. haven’t tried them for awhile, give them another shot The cost to reserve and receive a 5 parameter kit and brighten your summer days. is $7.00. The “Basic” kit will test for Nitrates, Nitrites, Hardness, pH, and Alkalinity. This at-home, on-site, Sources “shirt pocket”, test kit is easy to use, reliable, accurate, and will provide you with immediate results (in your Most garden centers and garden catalogs have seeds read- home...no lab trips) of your water quality.