A. Horticulture



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CRS 523 STUDENT NOTES hedges and ground covers-1
2
Thevetia (milk bush): It is a very usegul hedge plant. It can also be used as a shrub. It can be trimmed to shape any height between 0.6m to 3.9m. The flowers are deep yellow (trumpet) shaped and are produced more abundantly when the plant is up to 1.2m in height. The leaves are pale green or light green and are very small or tiny. Propagation is by seeds dwhich germinates easily.

  • Acalypha: It is a beautiful plant which doubles up as a hedge as well as a shrub. There are various in the colour of the leaves from green bronze to crimson red. It is erect in habit and branches well but as it gets older it looks bare at the bottom and so needs proper pruning from the top to the bottom that is, keeping the top narrower than the middle and the bottom. It can grow to a height of 3.9m. However, it is prone to attack by mealy bug. Propagation is by stem cutting. Rooting is attained in 15-21 days after planting.

  • Ilex aquifolium (Holly): It is a beautiful hedge plant. Ilex aquifolium grows to 10-25 m (33-82ft) tall with a woody stem as wide as 40-80cm, rarely 100 cm (39 inch) or more in diameter. The leaves are 5-12 cm long and 2-6 cm broad; they are evergreen, lasting about five years, and are dark green on the upper surface and lighter on the underside, oval, leathery, shiny and about 5-9 cm long. In the young and in the lower limbs of mature trees, the leaves have three to five sharp spines on each side, pointing alternately upward and downward, while leaves of the upper branches in mature tree lack spines. The flowers are white, four-lobed, and pollinated by bees. Holly is dioecious, meaning that there are male plants and female plants. The sex cannot be determined until the plants begin flowering, usually between 4 and 12 years of age. In male specimens, the flowers are yellowish and appear in axillary groups. In the female, flowers are isolated or in group of three and are small and white or slightly pink, consist of four petals and four sepals partially fused at the base.

    ASSIGNMENT

    1. List 10 Ornamental plants that are shade-loving

    2. List 10 Ornamental plants that are sun-loving

    SUN-LOVING SHADE-LOVING

    1. Blanket flower Torenia

    2. Salvia Caladium

    3. Coreopsis Bletilla

    4. Purple coneflower Primulas

    5. Delphinium Coleus

    6. Artemisia Lungwort

    7. Ice plant Impatiens

    8. Asiatic lily Hostas

    9. Peony Dead Nettle

    10. Bearded iris Foam flower

    ASSIGNMENT
    List 7 deciduous shrub

    1. Red oaks (Quercus rubra)

    2. Red maple (Acer rubrum)

    3. White ash (Fraxinus americana)

    4. Silk tree (Albzia julibrissin)

    5. Catalpa (Catalpa speciosa)

    6. Maiden hair tee (Ginkgo biloba)

    7. Burning bush (Euonymus alata)

    ASSIGNMENT

    1. List 10 ornamental plants that can be used as ground covers propagated as seeds and using cuttings


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