isotonic (Ä«Â´sÅtonÂ´ik), adj equivalence in osmotic pressure. Specifically used in reference to a solution whose osmotic pressure is equal to that of a body fluid, such as blood plasma or tears, to which the solution is compared. isotonic muscle contraction, n See contraction, muscle, isotonic.
Best shade flowers â Perennials. There is a wide variety of flowers that grow in shade that are also perennials. These shade tolerant flowers can be planted once and will come back with lovely flowers year after year. 1  Astilbe. 2  Bee balm. 3  Bellflowers. 4  Bleeding-Heart.5  Forget-me-not.ome white flowers that grow in shade are: 1  Alyssum. 2  Astilbe. 3  Begonia. 4  Common Shootingstar. 5  Coral Bells. 6  Dropwort. 7  Heliotrope. 8  Impatiens.
General Culture. Regardless of whether you are growing your primroses as perennials or annuals, the care is the same. Locate the flowers where they will receive some indirect sunlight. Dappled shade works well, as does a location where they will receive morning sun followed by afternoon shade.n fact, they often bloom when mornings are still dark and the ground is still frozen. Desirable for their tolerance of cold temperatures and for their bright, cheerful flowers, primroses can be grown as either annuals or perennials.