Purple pearl, is Verbenaceae, purple pearl genus plants.

Shrub, about 2 meters high; branchlets, petioles and inflorescences are covered with coarse branched stellate hairs. Leaf blade ovate-oblong elliptic to elliptic, 7 to 18 cm long, 4 to 7 cm wide, apically long acuminate to mucronate, base cuneate, margins serrulate, surface drying dark brown, pubescent, abaxially gray-brown, densely stellate-pilose, both surfaces densely dark red or red finely granular-glandular dots; petiole 0.5 to 1 to cm long.

The cymes are 3 to 4.5 cm wide, 4 to 5 times divergent

The peduncle is not more than 1cm long; the bracts are minute, linear; the flower stalk is about 1mm long; the calyx is about 1mm long, covered with stellate hairs and dark red glandular dots, the calyx teeth obtuse-triangular; the corolla is purple, about 3mm long, covered with stellate pilose hairs and dark red glandular dots; the stamens are about 6mm long, and the anthers are ellipsoidal, minute, and about 1mm long, with the connectives covered with dark red glandular dots, and the locules longitudinally lobed; the ovaries are hairy.

Fruit globose, purple when ripe, glabrous, diameter about 2mm. flowering from June to July, fruiting from August to November.

Propagation method

Purple pearl seedling seedling and cuttings. Seedling seeding to take the withdrawal mode, the amount of seed 1kg / mu, after sowing with a fine sieve of yellow heart soil cover, about 0.5cm thick and then covered with manzanita or straw. late April seed germination out of the ground one after another, the germination rate of 44%, after germination in a timely manner to uncover the grass, fertilization; cuttings of seedlings in the spring cuttings in March to take two to three years old robust, excellent traits of the mother tree on the branches of the wood has been lignified. The thickness of the spike, 1 to 2.5cm is the best. Spike retained 2 to 3 nodes, cut into long 12 to 15cm, only to retain the top 2 to 3 leaves, and cut off its 2/3 to reduce evaporation, the lower incision cut into a horseshoe shape, to be smooth, anti-split rupture, the upper incision from the bud 1cm cut off the flat, every 50 for a tie, the base of the neat, 0.005% of the No. 6 rooting powder solution soaked for 16 hours.

The cuttings were taken out of the rooting powder treatment and inserted into the prepared seedbed, first drilling a hole with a small branch and then inserted. The depth of the cuttings is 2/3 of the length of the spike, then water thoroughly. Check often, water, and maintain the relative humidity of the air to prevent waterlogging. Can also be in May to June for summer cuttings nursery, using 1 year-old semi-woody branches, the top of the branch shoots removed, so as not to affect the survival rate, sand bed to fine river sand is preferred, watered thoroughly after insertion and shade shade and humidity, pay attention to the frequent inspection, maintain 80% to 90% of the relative humidity of the air, 1 month after the rooting, the survival rate of up to 80%, strengthen the management of the next year, you can transplanting afforestation.

Cultivation techniques

Garden selection

Purple beads planting garden should choose no water, air and heavy metal pollution, transportation, drainage and irrigation is convenient to the back of the back of the wind and the west of the sun in the dry soil, Tianshui field, the two in the field or sloping land planting. In September to October to dig 30cm deep, 30cm wide planting ditch, each meter planting ditch with organic fertilizer 3 to 4 kg and mix with the soil. Tianshui field, two dry field to open a good drainage ditch.

Scientific planting, November to the following year before and after the rain in March is the best time to plant purple pearl. When planting, the seedling is required to be correct, moderately deep and shallow, and step on the root of the soil tightly. Other periods of planting affect the survival rate and the year's yield. Plant spacing 0.3 meters by 1.5 meters, mu planting 1500 plants.

Management and maintenance

Purple pearl cultivation management is rough, after the fruit drop cut off the current year's branches, thick and strong to stay 1 to 2 sections, you can bear fruit every year.

Fertilizer management: purple pearl is not tolerant of waterlogging, the rainy season should pay attention to drainage, irrigation in the dry season can effectively improve the yield. Purple pearl base fertilizer to digestive sludge fertilizer, pig and cow dung, withered cake fertilizer, biofungus fertilizer is the best. In April to October, every 2 months to apply a thin manure, the purple pearl growth is very favorable. April needs to be plowed and weeded once (can not use herbicides), after cutting and loosening the soil, according to the planting ditch of 3 kg per meter of organic fertilizer to apply sufficient base fertilizer.