Legendary heirloom Beach Plum dwarf fruit tree on large shrub size LIVE PLANT NO Shipments to California or Hawaii, live plants are not permitted to be shipped into CA or HI. These are live dormant plants(no leaves). You are bidding on 1 seedling 6-12 inches tall. Ship Bare Root. Beach Plum ( Prunus maritima) is a small plum tree that can grow to about 7 feet tall with small purple plums. These plums are very popular in its native northeast but unknown elsewhere. They grow quite well throught much of the United States. They have adapted to grow wel in poor soil. Famous for plum pie and has a sweet-tart flavor all of its own. Plants grow into add shapes. 2 for pollination. These can also pollinate with American plum. These are hardy from zone 4 to 8, they produce in 2-4 years.