Drive around any neighborhood and you’ve probably seen a few of these neat little trees in front yards displaying big beautiful flower clusters. There are several different varieties of Hydrangea trees that will thrive in our zone. A fan favorite is the Limelight. Whether in a planting bed or as a standalone, this little tree will not disappoint. Big bright lime-green flowers appear in mid-summer and as the flowers age, the blooms will display different shades of pink and burgundy. Much like the shrub form, flowers on new wood, so pruning can be done in winter or early spring.