Cultivated in Europe for more than 2,000 years, the apple was introduced to this country soon after the Europeans first arrived. Today, Washington, New York, Michigan, California, Pennsylvania, and Virginia are the leading producers of apples. The number of trees has dropped since early in this century, but yields have remained about the same thanks to superior sites, soils and better orchard management. Per capita consumption of apples has suffered as better transportation has made citrus fruit more available. The most popular varieties are Red Delicious, Golden Delicious, McIntosh, Rome Beauty, Jonathan, and York. Such old standbys as Baldwin, Grimes, Northern Spy, and Wealthy are losing popularity.
Apples will grow in almost any soil, but do best in a clay loam. A general rule is that they thrive in soils suited to common cereals and potatoes. A sloped site promotes air drain-age, thus minimizing frost damage, but also encourages soil erosion. Such steep sites can be grown to alfalfa sod, and the growth cut two or three times a season.
Trees must be provided with plenty of organic matter, such as a heavy mulch of alfalfa or grass clippings. Sweet clover, seeded late in July, makes an excellent winter ground cover. Leave it standing through the following summer or turn it under in spring. If the surface soil is low in fertility, rye will do better than clover but must be turned under before it develops fully, as it tends to grow woody when mature and could threaten young trees.
Mulches should be deep enough to smother the weeds beneath the branches. Increase the depth of the mulches as the years pass: a five-year-old tree can use 100 pounds of straw; trees two to four years old will need proportionately less.
Natural forms of nitrogen can be applied in the fall after the foliage has dropped. Use 21/4 pounds of dried blood or 41/2 pounds of cottonseed meal per tree. If too much nitrogen reaches a tree late in the season, the resultant growth may be susceptible to winter injury.
Young trees have shallow root systems, and are therefore more vulnerable to shortages of water and nutrients than well-established trees. Larger trees also can rely on food re-serves in the bark and wood in hard times.
To protect trees from field mice and other small animals, place fine-mesh wire screens or wrap two thicknesses of aluminum foil around the base in the fall. Also, staking a new tree may be necessary where wind or heavy snow might cause it to grow crooked. Placing a four-inch barrier of one to two-inch crushed rock on the bottom, sides and top of the planting hole is also effective.
In late winter or early spring, while trees are dormant and before their buds begin to swell, a dormant oil spray should be applied. This mixture of 3 percent miscible oil and water smothers many insect eggs before hatching.
Buy healthy one or two-year-old trees about three to five feet tall and plant them after the leaves have fallen, from late October into early November. Freshly dug trees can also be planted early in spring, but in spring land dries slowly and the growing season maybe well advanced by the time the orchard is planted. Young apple trees withstand the shock of transplanting best when they are dormant, another good reason for fall planting. By planting your trees before the ground freezes, some new growth of the roots will take place at once and the trees will have a good start on the sea-son when spring comes.
Set the trees 40 feet apart in and between the rows. Make the holes for them just large enough to accommodate the root development of each tree. Set the trees an inch lower in the ground than they stood in the nursery; a young apple tree will not root any deeper by deep planting, and may suffer for it.
Trees of at least two varieties should be planted within 50 feet of one another, because pollination of one variety by the pollen from another is usually required for the trees to bear.
If your soil is very acid, broadcast one pound of lime and 1/2 pound of phosphate rock per tree over the entire orchard before planting. One-half this amount may well be sufficient for young trees grown in a cover crop that is mowed for mulch. If apple trees are grown in sod and mulched with non-legume hay, add dried blood or other nitrogenous fertilizer. Increase the amount with each recurring season, reaching a maximum application of two pounds of nitrogen for seven or eight-year-old trees. Apply nitrogenous material in a circle about three feet wide under the outer extremities of the branch spread.
A deficiency of nitrogen will show up as small, yellowish leaves. If the foliage rolls and scorches that indicates a lack of potassium in the soil. A liberal mulch of manure (or clover mulch to which lime has been added) mixed with the right amount of potash rock to the acre, will adjust the potassium deficiency.
The fall of apples, if not in excess, is a natural phenomenon, nature’s way of removing improperly pollinated fruit. This also removes fruit that the tree could not normally bring to maturity without exhausting its nutrient supply. Two abscission periods generally occur. The “first drop” begins shortly after petal fall and lasts for two or three weeks. The so-called “June drop,” which begins a few days after the completion of the first drop, is somewhat of a misnomer since it normally spans two to four weeks anywhere from late May to early June. Excessive drop may be caused by a deficiency of boron or magnesium, or by too little moisture, and heavy applications of nitrogen may encourage drop.
Apple scab spends the winter on dead fruit and dead leaves on or under the tree. It can be prevented largely by carefully removing all dead leaves and fruit to the compost heap and mulching under the tree. A dormant oil spray will also help.
Old Apple Trees
Apple trees may bear crops for 30 to 50 years. If the trunk or branches are badly rotted or about a quarter of the top is dead through disease or winter injury, it is not ordinarily worthwhile to attempt salvage. However, here’s some general advice when trying to bring new life into old neglected trees:
Cut out old wood and prune heavily to strong, new growth; remove all suckers not necessary to replace the top; prune out inter-lacing branches to open the trees to light and the circulation of air; break up the soil around the tree, working in a great deal of compost, manure and organic materials; apply organic nitrogen such as dried blood, cottonseed meal or nitrogen-rich sludge, about 25 to 35 pounds per tree; mulch heavily. Do this regularly for several seasons.
Vitamin C Content of Apples
Apples are an important source of vitamin C, although the varieties differ greatly in their level of this vitamin. While five Delicious apples provide a minimum amount of vitamin C, one could get the same amount from two Wine saps or one Baldwin. Yellow Newton and Northern Spy are other good sources. McIntosh, Jonathan and York Imperial rate low in vitamin C.
Baldwin is widely grown in the eastern United States. It is sensitive to the climatic extremes existing west of Lake Michigan, how-ever. Northern Spy, another high-C apple, is also adaptable to the midcontinent and eastern region. Northern Spy is an excellent dessert or eating apple, but is not too useful for cooking. Baldwin is just the reverse. It is good for making pies and applesauce, but not too good for eating fresh. So by planting both of those trees you will get good supplies of both cooking and eating apples that are rich in vitamin C.
Tests have shown that most of the vitamin C in apples is right in or under the skin, and the skin can contain five times as much of the vitamin as the flesh. It is interesting that small apples are richer in vitamin C than large apples; small apples have more area of skin per pound of fruit, and this greater percentage of skin is probably the cause of the higher vitamin C content. It is fortunate that apples lose very little of their vitamin C in storage. If stored at 36°F. (2.22°C.), Baldwin apples will lose no vitamin C over a period of five or six months. However, if the storage temperature gets up to 45° F (7.22° C), some of the vitamin content will be lost.
Selecting a Location for an Apple Tree
Each variety does best in certain regions of the country. In the Northeast, the Great Lakes keep the growing season cool and summer rainfall is usually dependable. Growers in the central Atlantic region worry more about rainfall. Warmer temperatures dictate that most orchards be placed at fairly high elevations in the Appalachians. Warm temperatures in the Ohio Basin region cause more importance to be placed on a sufficient rainfall; droughts tend to be quite serious. Soils that can hold water well to a depth of three to four feet will minimize the threat of damage. In the north central states, cold winters are the grower’s main concern. Cold-resistant varieties have been developed, and include Haralson, Honeygold, Red Baron, Joan, Secor, Anoka, and Regent. Sunny summers and relative freedom from spring frost damage make the West Coast an excellent apple-growing area, although large orchards often must be irrigated.
In general, the primary consideration determining what variety can be grown is temperature. Talk with growers in the immediate area and extension service agents about the dangers of spring frost, in particular, and the suitability of temperature the rest of the year.
A persistent heavy wind may render a site unsuitable, making spraying difficult and affecting fruit set. The best sites are elevated rolling or sloping fields; low-lying areas tend to collect cold air.
Although they cost a bit more initially, dwarf apple trees offer several advantages to the home orchardist. Most standard apple varieties take five to ten years to bear fruit; dwarf trees bear from one to three years after planting. A dwarf produces an average of one to three bushels (50 to 150 pounds) of fruit per season—plenty for the average family—and the fruit is as large as or larger than that of the standard tree. Because they grow only six to eight feet high – 15 feet in the case of semidwarfs – dwarfs are easy to spray and pick from. They also require much less space; you can plant six dwarfs in the amount of space required for one standard tree.
Gardeners interested in growing some of the colorful old apple varieties of yesteryear, either for their superior regional adaptability or exceptional taste, should consider grafting scions of old varieties like American Beauty, Rhode Island Greening and Cox Orange. Individuals and groups who raise these old favorites can often be traced through local nurseries, horticultural societies or county agricultural extension offices. Other old-time varieties that once flourished in backyards and small orchards include Ben Davis, Black Gilliflower, Blue Pearmain, Esopus Spitzenburg, Maiden’s Flush, Pound Sweet, Twenty Ounce, and Fameuse.