Crabapples are among the most popular spring flowering trees. They’re adaptable to a range of soil types. Buds for the next season will set in mid-summer, so prune in early June if needed. Suckers should be removed and pruning the center of the plant to encourage air movement can help prevent disease problems. Gladiator is a very hardy, narrow tree with pink flowers followed by small purple fruit and rich burgundy purple leaves all season.