Plant prairie fire crabapple tree in spring, after the ground has dried out to the point that it's no longer muddy. The roots of the tree will have a difficult time establishing if the soil is compacted. Prairie fire crabapple will do well in nearly any soil that isn't excessively wet. Plant the tree in full sunlight where it won't be shaded by tall buildings or other trees.
Give the prairie fire crabapple tree an inch of water every week that there is no rain. Allow a garden hose to drip slowly at the base of the tree. Watering deeply once a week will help the tree develop sturdy roots, and is preferable to frequent, shallow watering.
Fertilize the prairie fire crabapple tree once every year, in early spring, beginning when the tree is a year old. Use a balanced, time-release fertilizer.
Prune prairie fire crabapple in early spring before the tree blooms, or after it finished blooming in late spring. Remove any branches that are crossing other branches, as well as branches that are growing too closely together. Prune off any weak or damaged branches, or branches broken during the winter.
Remove any suckers as soon as they appear, as suckers will draw energy from the tree. Using pruning shears, cut the sucker close to the tree.