Plant List 11 - Aggie Horticulture - Texas A&M University

Rhododendron spp.Azaleas or Rhododendrons• “Rhododendrons” taxa tend to have larger leavesthat are mostly evergreen, and fewer larger clustersof blooms, somewhat coarser growth habit– Require moist acidic soils, use only in East Texas– Most commercial taxa are hybrids, wide array ofspectacular spring flower colors, a few in summerRosa spp.Roses• Woody shrubs, herbaceous perennials, semi-climbers– Variably cold hardy z. 2 to 7, south to 9 or 10, evergreen to deciduous• Thorniness (prickles) variable among species & cultivars• In breeding for flower types; fragrance, site adaptability, &disease/pest resistance have been sacrificed; famous, butoften over-ratedrated genusRosa spp.Roses• Numerous disease & pest problems– Black spot, aphids, powdery mildew, Japanese beetle• Shrub / antique roses offer more versatility in useIs the cureworse than thedisease?Rosmarinus officinalisRosemary• Shrub (z. 8-11),subshrub/herbaceous perennial (z. 7)• Upright 5’ shrub or sprawling / weeping 2’ tall mound• Dark green, blue-green, or gray-green green foliage– Pungently aromatic, culinary herb, dried fragranceRosmarinus officinalisRosemary• Small flowers, light blue/light pink, mildly effective• Intolerant of wet soils, but moderately drought, heat,and salt tolerant; soil pH adaptable; full sun is best• Herb garden, hedging (tolerates shearing), rockgardens, xeriscapes, over low walls, containers