GARDENING
It's time to adapt our mango-growing ways to South Florida
By FAIRCHILD TROPICAL BOTANIC GARDEN
It is said that in India people cherish two things above all else -- the monsoon and the mango. It is in these two truths that we in South Florida can find a common ground with our brothers and sisters in Asia.
In South Florida the mango flourishes, casting a protective shade over our daily lives. Thirty years ago we thought ourselves conquerors of the untamed South Florida wilderness. Properties were large and so, too, our fruit trees. These giants came with a considerable price tag for maintenance and suffered at the hands of hurricanes.
The taming of these Goliaths growing within our home landscapes remains a daily preoccupation for the arborist and urban horticulturist. But take heart, for the winds of change are blowing. The mango can now provide what the modern South Floridian desires. Among the wide diversity of color, flavor, season and tree size there is something for everyone.
Which variety is right for you? Haden still comes to mind for many of us, even though it is a most inappropriate choice due to its exaggerated tree size and disease susceptibility. It is time for a change. We must look to new varieties that provide manageable size, productivity, disease resistance and exceptional flavor.
Angie, Jean Ellen, Cogshall, Fairchild and Rosigold are a new generation of varieties that can provide all that the modern homeowner desires. Each will form a small, manageable tree, has excellent disease resistance and exceptional flavor. There will be no need for pesticides, and the small sizes will make horticultural management a pleasure and room for more than one.
You should grow your mangoes in concert with our surroundings, avoiding the heavy chemical hand of fertilization and pest control. This should be welcome news to the homeowner. Yet old habits die hard and we are taught to fear all that crawls or flies among our mango trees.
Sadly, it is not considered wise to simply live as part of the grand system. You, your trees and the insects and fungi among them are all part of a complex and wonderful system, a circle of life.
Choose a healthy tree of reasonable size; there is no reason to plant a tree that is already fruiting. In fact, a small, two-gallon container tree will establish faster and resist hurricanes better than a large tree. It will fruit within two years if given proper care.
A thorough watering at planting and a firming of the soil will suffice. Do not add chemical fertilizers or soil amendments. The mango tree is well adapted to South Florida soils and climate and does not need such treatment.
Watering should be provided every fourth day if there is no rainfall. Watering should continue until the tree is established in about six months. To avoid the need for watering, your trees can be planted in the summer when our rains are heavy and consistent. After establishment the mango tree will need no supplemental watering. An irrigation system will increase the incidence and severity of disease, reduce flowering and lower the quality of your mango trees, so turn it off or protect your mango tree from it.
Do not burn a mango tree with fertilizer. We recommend that no nitrogen fertilizers be given to the young tree until fruiting begins. Nitrogen is the first of the three numbers that appear on the fertilizer label. You should use instead a potassium fertilizer. Potassium is the last of the three numbers on the label. We use a 0-0-50 formulation, sprinkled lightly below the drip-line of the canopy three times a year. Take care not to apply the fertilizer to the trunk. The ultimate in green care for your tree is to supply all your nitrogen in the form of an organic plant mulch or properly composted manure.
Pruning must begin immediately and last throughout the life of the tree. At planting the terminal bud is cut to encourage branching. The young tree will make from three to five branches below the pruning cut. When these new shoots have produced two growth flushes of new leaves they are tipped to encourage further branching. Tipping is critical in the first four years and results in the formation of a mango ``bush.'' The mango bush will bloom and fruit earlier than a tree not pruned this way. After the fourth year, one must thin the canopy by removing at least one major branch per year. This must be done on trees that are vigorous and may not be necessary on the more dwarf modern varieties.
It is time to embrace the new. It is time for a mango change. We have the varieties, we have the technology, and most importantly, we have attained the level of understanding to allow us the patience to grow green. The mango and the homeowner can grow together as part of this grand system that we live in. Your neighbors will thank you, our lakes and oceans will benefit, and you in the meanwhile can simply enjoy the fruits of your labors. Good growing!
Writer Richard J. Campbell, Ph.D., is Fairchild's curator of tropical fruit.
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