When do plums ripen?
A poem once praised: "It rains at home in Huangmei season, and frogs are everywhere in the grass pond." Rainy days, this poetic name is worthy of the name in this season. In this season, it means that plums are ripe for picking. This time is just spring, that is, around May, so the plum season is when plums are not ripe, almost in the middle and late April.
Characteristics of green plum
Trees, with white aromatic resin, are about 20 meters high. Branchlets are stellate tomentose. Leaves leathery, entire, oblong to oblong-lanceolate, 5-13cm long, 2-5cm wide, tapering or short at the top, rounded or wedge-shaped at the base, 7- 12 pairs of lateral veins, protruding on both sides, obvious reticulate veins, no hair or sparse hair; Petiole is 7- 15 mm long and densely covered with grayish yellow short fluff.
Panicle terminal or axillary, 4-8 cm long, slender, covered with silver-gray stellate hairs or scaly hairs. 5 calyx lobes, arranged in tweezers, ovate-lanceolate or oblong, with different sizes, about 3 mm long and 2 mm wide, and densely covered with stellate hairs or scaly hairs on both sides; Petals, white, sometimes pale yellow or reddish, fragrant, rectangular or linear spoon-shaped, about 1 cm long and 4 mm wide, densely hairy outside and hairless inside; Stamens 15, filaments short and unequal, anthers oblong, connective appendages short and obtuse; Ovary spherical, densely short villous, short style, capitate stigma, 3-lobed. The fruit is spherical; The two swollen calyx lobes are longer, 3-4 cm long, 1- 1.5 cm wide, with rounded apex and 5 longitudinal veins.
Growth habit of plum blossom
Plum blossom is a light-loving plant. Timely pruning and plastic surgery is helpful to form a natural happy crown and promote ventilation and light transmission of the crown. Plum blossoms are suitable for warm climate and cold tolerance. At the flowering stage of -8 ~-9℃, the cold resistance of young fruits weakened and they were frozen at -3 ~-5℃.
The planting place should be a place with good lighting conditions, no pollution around and sufficient water. The soil layer in the garden is deep, fertile, moist and well drained. Generally, the green plum base should be built in a relatively flat mountain nest or halfway up the mountain.
Fertilization of young trees is based on the principle of thin fertilizer and quick-acting fertilizer. Results The tree was fertilized three times a year, the first time after fruit picking, the second time before flowering and the third time in the small fruit period after flowering. Before flowering, high-quality organic fertilizer should be applied, mainly human and animal manure, cake fertilizer or farm manure, which accounts for 2/3 of the annual fertilization. Foliar fertilizers such as potassium dihydrogen phosphate were applied to the roots in bud stage and small fruit stage, and appropriate lime was applied to supplement calcium to neutralize the soil pH value.