The Arizona Olive Tree: Public Enemy Number One. Choose fruiting or fruitless olive trees, country of origin, or landscape versus commercial use. The Swan Hill olive is the most popular variety of fruitless olive tree. Olives trees (Olea europaea L.), hardy in U.S. Department of Agriculture plant hardiness zones 9 through 11, are drought-tolerant … Flowering season: n/a Swan Hill Olive Tree With Suspicious Pollen Clusters, 16611 S 40th St, Ste. Bloom color: n/a A popular imported landscape addition since around the 1930s, the Olive tree has become one of Arizona’s’ most notorious contributors to our seasonal allergy misery. The Olive tree is so sensitizing that planting fruiting Olives has been discouraged or banned in Phoenix and Tucson since the 1960s    Nurseries and landscape companies are not allowed to sell or plant them. One problem is that there have been reports of nurseries in the East Valley selling conventional Olive trees as the non-fruiting variety. Other plants are not so economic and literally toss their goods to the wind, producing a dust storm of pollen in hopes that out of the enormous quantity of pollen produced, some will reach their mark. If you wanted a nice, hypoallergenic shade tree in your yard in Ahwatukee you just asked your landscaper or nursery for a Swan Hill Olive and you were set. We are a local company: your privacy and comfort matter to us. At maturity, this variety can reach 35 feet in height but is drought intolerant. It is accepted for use by the City of Tucson and most neighborhood associations. Give them a gift that grows: a Civano Nursery Gift Card. 170, Phoenix, 85048 | (480) 705-8844 |, http://www.allergywise.com/wp-content/uploads/2016/06/1-2.jpg, http://www.allergywise.com/wp-content/uploads/2016/04/ahwatukee-allergy-specialist.png, Arizona Olive Trees: Life Will Find a Way, © Copyright - Arizona Allergy and Asthma Specialists -. All this blowing pollen gets on our skin, in our eyes, up our noses, and down our windpipes, causing itching, sneezing, dripping, and wheezing. How to Water Olive Trees. ‘Wilsonii’ is a fruitless variety that produces little to no pollen. Height: 25 – 30 feet Width: 25 feet NO SPAM ZONE: You can unsubscribe at any time. Since the tree doesn’t put energy into making fruit, it grows a little faster than fruiting olive trees. They are generally associated with the Mediterranean region, where they have been in cultivation for more than 5000 years! This feature has resulted in the Swan Hill fruitless olive tree becoming more popular. Olive trees have been grown for so long that it’s unclear exactly where they originally came from. Click to find the information you need to select those adapted to your environment. It can live for more than 150 years, has light gray, scaly bark and ovate gray-green leaves. The most distinctive visual feature of an Olive Tree is its smooth grey trunk that becomes gnarled and knotted with age, endowing each tree with unique character and a picturesque silhouette. A popular imported landscape addition since around the 1930s, the Olive tree has become one of Arizona’s’ most notorious contributors to our seasonal allergy misery. With no fruit, there’s no pollen. The Olive’s evergreen, silvery foliage creates a finely textured, cloud-shaped canopy, casting deep to filtered shade throughout the long life of the tree. The Olive tree is so sensitizing that planting fruiting Olives has been discouraged or banned in Phoenix and Tucson since the 1960s Nurseries and landscape companies are not allowed to sell or plant them. In the plant world, this power is on grand display every spring in the form of fantastic flowers and although flowers look and smell nice,  it’s all business for the plant. Is there someone special in your life who loves to watch things grow? ‘Wilsonii’ is a fruitless variety that produces little to no pollen. It is either a single- or multiple-trunk, has narrow, gray-green foliage with a light silvery-green on the undersides of the leaves. This is where we come in. The other problem (which is what made me think of that phrase from Jurassic Park) is that non-fruiting Olive trees may revert back to their natural, virile state. The fruitless olive is a distinctive evergreen that grows at a slow to medium rate to twenty-five to thirty feet tall and wide, and has an airy appearance. Fruitless Olive trees crave full sun and are able to tolerate poor, stony, shallow soils so you can plant this tree on a variety of landscape styles. With very little water requirements once established, this resilient medium-sized tree can grow with a widespread, making this a great tree for use as a canopy tree for shade or as a silhouette against structures, bringing shade to sun-facing rooms. Width: 25 feet When plants require the services of insects such as bees to deliver pollen from one plant to another, those services are advertised and paid for in the currency of attractive flowers and sweets (nectar). This was described to me by a landscape business owner in Ahwatukee who has witnessed this transformation in trees that he knew to be true San Hill varieties, but which, in time, found their true, pollinating machismo, as it were. The Olive’s evergreen, silvery foliage creates a finely textured, cloud-shaped canopy, casting deep to filtered shade throughout the long life of the tree. This is an efficient system with little wasted pollen. We won't spam you. Then click any image to learn more details about each olive tree cultivar. And yet, the Olive tree is an attractive tree and still very popular, and so to get around the planting restriction, “non-fruiting” (less pollen and less fruit) varieties, such as the San Hill Olive, were developed and sold by nurseries as a less messy and hypoallergenic alternative. It is accepted for use by the City of Tucson and most neighborhood associations. You probable could not tell the difference in a newly planted tree and by the time it became clear that your supposedly impotent hypoallergenic purchase was actually quite capable of doing it’s part to propagate the species, yanking a mature tree out of the yard might not be an appealing option. Reproduction is one of the most powerful forces in nature. Cold hardiness: 15° F. Our catalog features almost 600 different plants. Olive trees for sale, filter selections by clicking on the criteria below. Height: 25 – 30 feet With no fruit, there’s no mess along your stonework, pathway, patio deck or poolside. USDA minimum zone: 8

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