Crab apple tree named ‘B17Crab7’

A new crab apple tree particularly distinguished by fruit with a distinct ellipsoid conical (ovoid) shape, long pedicel that is red (stem), and range in weight from 20-45 g. The fruit have a predominantly dark red, reddish-purple skin colour and cherry coloured red flesh. When pressed, crimson red juice is extracted that is high in acidity and polyphenols. The tree is moderately vigorous, red leaves at bloom that turn dark green during development. Flowers are pink in color when fully open. The shoots have a distinctly red colour which is clearly distinguishable from other apple cultivars, is disclosed.