Division and Growth
The quality of planting material plays an important role in providing the necessary decorative effect when planting perennials on permanent sites. The planting of finely divided rhizomes, underdeveloped annual seedlings, small bulbs or green cuttings of the first year of rooting will not give the proper effect: the plants during the first year, and some species will faint for the second year. For example, the finely divided roots of the peony do not reach full development even in the third year and bloom only on the fourth.
All the perennial seedlings propagated by seeds and vegetatively( except when the rhizomes are divided into large parts) should be grown to permanent sites within 1-2 years. Cultivate strongly divided perennial bushes, rooted cuttings and seedlings are necessary on fertilized and cultivated ridges.
Most perennials reproduce by dividing the bush, which is carried out in the spring or autumn - depending on the flowering time of this species. If the plants bloom in the spring or early summer, then they are divided in autumn, and the species that bloom in summer and autumn, are divided in spring.
When plants grow, they require a smaller feeding area than with a normal planting.
When dividing old perennial bushes into several large parts with the expectation that each one has 5-8 buds, they can be planted on permanent sites without first growing up. Just divide the large flower bulbs of lilies, tulips, daffodils and other bulbous plants. The division of old perennial bushes, long growing in one place, except for the purpose of increasing the number of plants and reproduction, also has a rejuvenating effect on the plant.
Timely transplantation and division of perennials - mandatory measures for caring for plants. This also ensures the rejuvenation of plants.
So, for example, during transplantation it is not recommended to transplant perennial bushes of perennials, they will not give abundant flowering, as as a result of prolonged stay of bushes in one place shoots become very crowded, the stems are thinned and become weakly infested, and the flowers and inflorescences are very small. In phlox, goldenrod, spur, pyrethrum, cimici-fugue and many other perennials, the decorativeness of the inflorescence and the bush in general is sharply reduced. In such cases, plant transplantation is recommended to be combined with division.
When growing and planting perennials, warming the soil is very important. Polyethylene films are particularly suitable for this purpose. They are light, fairly cheap, elastic, transparent;can be used both for obtaining an earlier flowering, and for protecting plants from early frosts.