By: Liz Baessler
The Jonamac apple variety is known for its crisp, flavorful fruit and its tolerance of extreme cold. It is a very good apple tree to grow in cold climates. Keep reading to learn more about Jonamac apple care and growing requirements for Jonamac apple trees.
First introduced in 1944 by Roger D. Way of the New York State Agricultural Experiment Station, the Jonamac apple variety is a cross between Jonathan and McIntosh apples. It is extremely cold hardy, able to withstand temperatures as low as -50 F. (-46 C.). Because of this, it is a favorite among apple growers in the far north.
The trees are medium in size and growth rate, usually reaching 12 to 25 feet (3.7-7.6 m.) in height, with a spread of 15 to 25 feet (4.6-7.6 m.). The apples themselves are medium in size and usually slightly irregular in shape. They are deep red in color, with a little bit of green showing through from underneath.
They have a firm texture and a crisp, sharp, pleasant flavor very similar to that of a McIntosh. The apples can be harvested in early autumn and store very well. Due to their crisp flavor, they are used almost exclusively as eating apples and are rarely seen in desserts.
Jonamac apple care is relatively easy. The trees rarely need winter protection, and they are somewhat resistant to cedar apple rust.
While they prefer well-draining, moist soil and full sunlight, they will tolerate some drought and some shade. They can grow in a range of pH levels too.
In order to get the best fruit production and to avoid the spread of apple scab, to which it is somewhat susceptible, the apple tree should be pruned vigorously. This will allow sunlight to reach all parts of the branches.
This article was last updated on
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Resistant to Cedar-Apple Rust
This plant is attractive to bees, butterflies and/or birds
Average Water Needs Water regularly do not overwater
This plant is said to grow outdoors in the following regions:
On Dec 31, 2005, Big_Red from Bethelridge, KY (Zone 6a) wrote:
" McIntosh x Jonathan Developed by the NY State Agricultural Experiment Station, introduced in 1972.
Good eating and keeping apple. Medium-sized attractive fruit, striped red with high colour in spots. Flesh juicy and crisp. flavor refreshing and subacid."
Dwarf apple trees are standard apple varieties that have been grafted onto a dwarfing rootstock. Hardy in U.S. Department of Agriculture plant hardiness zones 3 through 9, they typically grow between 10 and 12 feet tall. When selecting a dwarf apple tree, remember that most varieties need between seven and nine weeks of chilling to break dormancy. Apple trees are not self-pollinating, so you'll need to plant two different varieties to ensure pollination. A few varieties suited for mild, coastal regions include "Yellow Delicious" (Pyrus malus "Yellow Delicious"), "Fuji" (Pyrus malus "Fuji"), "Gala" (Pyrus malus "Gala"), "Mitsu" (Pyrus malus "Mitsu") and "Jonamac" (Pyrus malus "Jonamac"). Diseases are common in damp, foggy coastal regions, but several varieties, including "Enterprise" (Pyrus malus "Enterprise") and "Liberty (Pyrus malus "Liberty") are disease resistant. If you live in a very warm region, select low-chill varieties, such as "Beverly Hills" (Pyrus malus "Beverly Hills").
The ISU Extension also recommends the European plum tree Stanley (Prunus domestica Stanley) for the state's home gardeners. Another self-pollinator, Stanley reaches 8 to 10 feet high with a similar spread. It thrives through central and southern parts of the state. This prune-plum cultivar has white April blooms. The standard-sized, oblong bluish purple fruit with sweet yellow-green flesh ripens in September.
Plant 'Stanley' in full sun and well-drained soil of average moisture. Like "North Star' cherry, this tree needs periodic spraying for pests. Locate it accordingly. ( Reference 1, p. 14 Ref 2 "Species and varieties" subheading Ref 4)