The epidermis of petals also form a variation of trichomes called conical cells. These cells all develop from the pavement cells, which make up the majority of the plants surface cells. In short, cellular differentiation of the epidermal cells is controlled by two major factors: genetics and environmental conditions.
Azaleas and rhododendrons thrive in acidic soil. Azaleas and rhododendrons thrive in the acidic soil that is common under pine trees. Both plants are classified under the genus Rhododendron; the main difference is the smaller, funnel-shaped flowers on the azalea.ake soil samples from the area under the trees where you want to plant the azaleas or rhododendrons. Mix the samples in a bucket and test with a soil pH test kit.
Plant Tips. May...in the rhododendron garden. Gardeners who are in shape...are ready for the wonderful month of May in the garden. This is the month many rhododendrons return all the care given them by providing us with their glorious blooms...and it is also the month for getting them in the best possible shape. cleaning up frost damage... Many of us have discovered the early April frosts destroyed some of the emerging buds on our rhododendrons.