Rare And Exotic Garden Perennials For Landscape Planting
The term, ‘perennial plant’, means simply that the plant returns following severe freezes, to grow again the next year. Trees are cold hardy tested perennials by nature, some trees that are evergreens and do not go dormant, but merely s lawn care services nj low down during various seasons, and other shade trees enter dormancy and shed the leaves. Tree growth of shade trees may stop altogether in extremely cold climates, but in the spring, will surge with buds that open to flower and leaf out.
Great difficulties arise in assigning a plant, ‘perennial’, mainly because the primary determining factor, temperature range varies from year to year; and every century extreme cold temperatures may erase certain plant populations that have survived in areas before for decades or sometimes even centuries. A perennial plant may be a survivor, thus a “perennial” for a given growing area, then suddenly may become extinct in that growing area. The USDA has constructed a zone map that reveals averages of temperatures reached by the location in your State. This map is a nursery tool used to predict whether a perennial will live (cold hardy) in your area.
Agaves are a diverse genus of over 200 species of rosette, spear-like, leafed evergreen perennials. Agave typically grows as low shrub-like plants in dry or well-drained soils of the Southern part of the U.S. from New Jersey down to Florida, and then West to California. Many Agave species, such as Agave americana or Agave tequilana, have sharp recurved, protective teeth running along both sides of the blade of its semi-curved, lance-shaped leaves, with a sharp needle-tip lance at the end. There are Agave species, like Agave attenuata, and Agave stricta, that do not have sharp-teeth at all, but are smooth. The color variations of Agave plants range from shades of green, to silvery-grey, bluish-green, top yellow or white stripes, such is the case with Agave americana ‘media-picta’. The bloom of mother Agave plants are a beautiful array of pendulent bell-shaped, creamy-white flowers soaring high above the mother plant on a flower stem that may reach 20 feet or more for some agave species. The bloom period of a mother Agave plant is during the summer and the flower stalk is magnificent to behold, however, this event means the cycle of life ends for mother Agave and begins again for her Agave offspring. Agave plants are an excellent choice for rock gardens or well drained soils that lend themselves well to terracotta or cement planters. Agaves are fairly slow glowers so expect higher prices on these sunloving garden jewels at retail garden centers. Huge specimen agaves can be quickly delivered by semi-trucks.