Weymouth pine (Latin Pinus strobus) is an evergreen large tree of the Pine family. It is most widespread in the northeastern United States and southeastern Canada. Literally, Pinus strobus translates as "pine with cones", and the name "Weymouth" pine received in honor of the discoverer - Lord Weymouth (Weymouth).
It grows up to 40-70 m in height, the crown diameter reaches 12-15 m. The crown initially has a regular narrow-pyramidal shape, with age it becomes more irregular and wide-pyramidal.
A distinctive feature of Weymouth pine from other species is its needles: they are located 5 in a bunch, 7-12 cm long and 0.8-1 mm thick, dark green or bluish-green in color, renewed every 2-3 years.
Weymouth pine is one of the fastest growing conifers, second only to larch in growth rate. Hardy, less demanding on light than Scots pine or black pine. For the most part, it is not demanding on soils, it grows well on all species, except for saline soil. Among the disadvantages: weak resistance to rust (fungal disease), therefore, it is recommended to plant it away from the carriers of the disease: currants, gooseberries, hawthorns and mountain ash. Of the advantages, it is worth noting the high growth rate, especially in the period from 10 to 40 years. At the age of 40, the height reaches 18-19 meters. Lives for over 400 years.
Other names: White Oriental Pine
Weymouth pine - popular varieties:
Pine Weymouth Pumila or Low-growing (Pinus strobus Pumila) - undersized form, height (and crown diameter) 1-1.5 m.Annual growth up to 5 cm. The crown is rounded, needles up to 10 cm long. lawn.
Pine Weymouth Radiata or Radiant (Pinus strobus Radiata) is also a short form, with a height (and crown diameter) of up to 1.5 m. The crown shape is rounded, spherical. Annual growth is 10 cm in height and 10 cm in width.The needles are gray-blue in color, up to 10 cm long.
Weymouth Pine Pendula (Pinus strobus Pendula) is a weeping form, with a height and crown diameter of 4 m. Annual growth is 35-40 cm. The needles are bluish-green in color, the cones are light brown with a purple tint.
Purchase of seedlings. The root system of pines, like other conifers, should be in an earthen coma, wrapped in cloth, or in a container. It is also worth paying attention to the condition of the needles, it should have an intense color. The seedlings must be adapted to the climate of the zone where they will be planted.
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Location and landing. Weymouth pine is light-requiring, so it is better to choose a place open to sunlight. Since this species is weakly resistant to rust (rust fungus), there should be no currants, gooseberries, hawthorns and mountain ash near the pine plantings, which can be a carrier of this disease.
Planting time: late August - mid September or late April - early May. Pine is not very demanding on soils, but it develops better on moist, drained soils. Prefers neutral and leached chernozem (i.e. with the addition of lime), sandy loam and loamy soils, but does not like saline soils.
When planting in groups, the distance between plants should be kept within 1.5 m for small forms and 4 m for large ones. The depth of the planting pit is 0.7 - 0.9 m.At the bottom, make drainage from broken brick with sand 15-20 cm thick.Add sand to the garden soil, for acidic soils - 200-300 g of lime, for feeding - 50 g of nitroammofoska ... After planting, make sure that the root collar is at the level of the soil, pour plenty of water.
Watering. Adult pines are drought-resistant, but young seedlings need additional watering. In order for young pines to survive the winter well, it is recommended to carry out 3-4 watering in autumn, 10-15 liters per plant.
Loosening, mulching. Mulching the soil around the trunk prevents the soil from drying out and smoothes temperature changes in winter. Mulch is a 10-15 cm layer of crushed sawdust, wood chips, bark, peat or leaf humus, and serves as an excellent source of nutrients for the roots. When compacting the soil, it is useful to periodically loosen it, while the mulch layer is mixed with the ground and in the fall it will need to be poured again.
Top dressing. Usually feeding is carried out during planting: 40-50 g of nitroammofoska or humus earth. During the first two years after planting, young pines can (but not necessarily) be fed with fertilizers for conifers.
Trimming and shaping. To create a denser crown and slow down the growth of a pine in the spring, pinching of part of the annual shoots is carried out.
Reproduction and grafting. For reproduction of Weymouth pine, two methods are used: seed and grafting. Highly decorative and varietal trees are propagated by grafting. Cuttings are not used due to the poor survival rate of cuttings. Seed propagation gives good results, especially with preliminary seed stratification.
Diseases and pests. Weymouth pine has a low resistance to rust (rust fungus). It is recommended not to plant currants, gooseberries, hawthorns and mountain ash near pine plantings, which can be a carrier of this disease. When bright orange pads of the mushroom appear, starting from May, three times are treated with rogor or Bordeaux liquid.
Young plantings can be exposed to the disease - shute, while the needles turn yellow and crumble. For prevention, the seedlings are fed with organic fertilizers and watered, the fallen needles are certainly removed. To combat the disease: in July and August, plants are treated with a 2% solution of colloidal sulfur or Bordeaux liquid.
Plants in winter. Weymouth pine is quite winter-hardy, but it is recommended to cover young plantings for the winter with spruce branches or burlap. Covering material is mainly needed to protect plants from sunburn in February-March. The shelter can be removed in April.
PHOTO OF WEIMUTA PINE