Rosmarinus officinalis “Renzels”“ IRENE
Plant Abstract

Known as- Rosemary
Grow Zone - 7 to 10
Type- Herbaceous perennial
Familial- Lamiaceae
Smith Scl. hardy? No
Geography- None
ht.- 1 to 1.5 ft.
Span- 1 to 3 ft.
Coloring- Violet blue
Shade/Light- Full sun
Moisture- Dry to moderate dampure
Hi/Lo Maint- Medium
Easily grown in average, arid to moderate wet, well-drained soils in full sun. Tolerates light shade, but best performance is in full sun. Established plants have good drought tolerance. Performs poorly in heavy clay soils. Wet, poorly drained soils in winter are usually fatal. Sheer plants lightly after bloom to encourage dense foliage growth. Plants need a protected location and winter mulch in he St. Louis area where they are not reliably winter hardy. Plants often will not survive when winter temperatures dip below zero degrees F. May be grown in containers or hanging baskets and overwintered indoors.
This rosemary cultivar is a procumbent, spreading ground cover which is typically grown for ornamental purposes rather than culinary ones. Features a foliage mound from 12-18’ tall which spreads out to as much as 36’ wide. Deep violet-blue, two-lipped flowers appear in axillary clusters in early to mid summer. Leathery, needle-like leaves to 1.25’ long are pleasantly aromatic. Leaves may be used fresh or dried for seasoning food or dried for use in potpourris, though the species is probably better for these purposes. This cultivar is patented (Pat. #9124) under the name of “Renzels”.
No serious insect or disease problems. Mildew and root rot may occur in damp locations. Winter hardiness is a problem for the St. Louis area.
Common Applications-
Ground cover for border fronts, rock gardens or herb gardens. Cascades well over stone walls. Also effective in hanging baskets or patio containers.