Blackberry, Triple Crown Thornless BlackberryTriple Crown Thornless Blackberry is a sturdy erect variety of the deciduous shrub that produces very heavy yields of extra large fruits and does not requires staking. The pink white rose like flowers give way to clusters of fruits in which ripen in summer. Fruits best in full sun and rich, moist, slightly acidic well drained soils. Triple Crown is self fruiting and has wind resistance, but is intolerant of wet soils. Type: Shrub Height: 4' 8' Spread: