Silvered pine: irrigation
Silver Pine is a conifer native to North America; loves fresh and moist soils, therefore it needs regular watering, especially during the summer season and in the case of particularly young specimens, or to stay for a short time. They are trees that can become majestic with the passage of time, even if in Italy they tend to stay within fairly small dimensions, almost never exceeding 3-4 meters in height. Trees that have been planted for a long time can withstand short periods of drought, but it is always advisable to ensure that the soil never remains dry for a long time. From April to September, it is advisable to water every time the soil is dry, avoiding excessive wetting. During the cold months it is not necessary to irrigate, as the plants are in partial vegetative rest and the climate is still fresh and humid.
The cultivation of silver pine
The silver pine is particularly appreciated in gardens around the world, thanks to its silver-gray colored leaves, which appear almost blue under the sunlight, the silver pine is in fact also known as blue spruce. It is a very decorative plant, which maintains the foliage throughout the year. It is cultivated in a very well drained soil and, after a few years from planting, it tends not to require great care. Pruning must be kept to a minimum, periodically removing only broken or weathered branches. Conifers in fact do not like any type of pruning and tend, over time, to maintain a graceful and pleasant habit, forming a thick cone with horizontal branches, sometimes slightly downwards. On the market there are different varieties of silver pine, some of which are particularly compact, which do not exceed one meter in height. Dwarf varieties are also used in the mixed border or in flower beds.
Fertilize the tree
The silver pine is a very slow-growing conifer, which generally does not require regular fertilization. When a silver pine is planted, pelleted manure is mixed with the cultivated soil, in order to stimulate the development of the roots and to provide a soil with a soft and quite friable mixture. During the development of the tree, which can last several decades, small doses of slow release granular fertilizer are supplied, to be spread at the base of the stem once a year, at the end of winter. Other types of fertilization are not necessary even if the silver pine tends to prefer quite acid soils; for this reason it may be useful to mix the soil at the base of the soil plant specific for acidophilic plants, which helps to lower the pH of the soil.
Silver pine: Pests and diseases
If cultivated in ideal conditions for its development, silver pine tends not to be attacked by any type of parasite. It is a conifer that loves a cool climate and sunny locations. To obtain this type of environmental conditions in Italy it is advisable to place the silver pine in a place in partial shade, sheltered from the sun during the hottest hours of the day. The summer climate favors the spread of mites and scale insects on the plant, which can lead to the yellowing of some needles. To eradicate these parasites it is necessary to vaporize the entire foliage with special insecticidal and acaricidal products, which is possible only with young specimens or with dwarf varieties. Silver pine can also be affected by rust, which requires treatments with copper-based antifungal products.