The Latest Cultivation Techniques and Methods Tutorial for Mahonia

Mahonia, also known as Chinese holly grape, cat-spine leaf, Huangtianzhu, etc., is a shrub plant of the genus Mahonia in the family Berberidaceae. It can be grown as a potted plant and is often used for landscaping and medicinal purposes. As a medicine, it has the effects of clearing heat and detoxifying, reducing swelling, and stopping diarrhea, and is mainly used to treat diarrhea, dysentery, jaundice hepatitis, burns, scalds, and sores. Now let us take a look at the cultivation techniques of Mahonia.

Growth Habits of Mahonia

Mahonia is a warm temperate plant with strong cold resistance but poor tolerance to summer heat. It prefers a warm and humid climate, is vigorous, shade-tolerant, and avoids direct sun exposure. It has a certain degree of cold resistance and is also relatively drought-resistant. In its place of origin, it mostly grows in shady, humid canyons and beneath forests, and is a shade-loving plant. The flowering period is from July to September, and the fruiting period is from September to November. It has low soil requirements, prefers well-drained acidic humus soil, is extremely intolerant of alkali, and fears waterlogging. It grows best in loose, fertile, well-drained sandy loam. It has strong tillering and lateral bud sprouting ability. Each plant sprouts 2 to 3 branches per year, and in that same year the height can reach about 20 cm.

Propagation Methods of Mahonia

1. Seed propagation: Mahonia is usually sown in March. After sowing, cover with soil 1 to 2 cm deep, water thoroughly, and place in a semi-shaded place. It germinates in about 1 month. It can also be sown directly after seed treatment, sown in a semi-shaded environment in rows in a seedbed, with 3 to 5 cm of soil covering. The suitable temperature for seed germination is 15 to 25 degrees C, and it can germinate and emerge in about 50 days. Seedlings of the current year generally reach 8 to 10 cm in height. During overwintering, slightly protect them from the cold, leave them in the bed for another year of cultivation, and only in the second year can they be transplanted with wider spacing. Seedlings usually need to be cultivated for 4 to 5 years before they can bloom and bear fruit.

2. Cutting propagation: Hardwood cuttings are best done from February to March. Cut 1- to 2-year-old healthy branches and insert them into a sandy loam seedbed, keeping the seedbed moist. Starting in May, build a shade frame, and on sunny days spray water every day to maintain moisture. About 2 months after insertion, they can take root. Softwood cuttings can be done during the plum rain season. Choose fully developed branches of the current year or use one-year-old branches. Keep the seedbed temperature at 25 to 30 degrees C. After one month, they can take root, and the survival rate can reach more than 90%. If the branches are treated with a rooting agent, the rooting rate can reach more than 90%.

3. Division propagation: Division can be carried out from mid-October to mid-November or from late February to late March, and can also be done in combination with spring repotting. Dig up clustered field-grown plants, or remove large clustered potted plants from the flowerpot, then cut or tear them apart from the weak point where the rhizome joins. Each division should carry 2 to 3 stems and a portion of intact roots. After lightly pruning the leaves, plant them in the field or pot them.

Cultivation Techniques of Mahonia

1. Timely transplanting: Field-grown Mahonia plants are managed relatively extensively. They can be transplanted with a soil ball before budding in early spring. Apply sufficient base fertilizer when planting, compact the soil after planting, and water thoroughly. One- to two-year-old seedlings grow slowly, and growth accelerates from the third year.

2. Intertillage and weeding: Mahonia should be intertilled and weeded 3 to 5 times throughout the year to make the soil loose, increase soil permeability, and benefit plant growth and fruiting. During intertillage, the soil around the root zone should be shallow, while farther away it can be slightly deeper; be sure not to damage the roots, so as to benefit plant growth and fruiting. Thin flowers and remove weeds in time, and loosen the soil after each watering and rain.

3. Water and fertilizer management: Pay attention to watering Mahonia during drought, and irrigation is best. Methods such as furrow irrigation, sprinkler irrigation, and pouring irrigation can be used. Apply decomposed cake fertilizer or poultry and livestock manure once before winter each year, and it will grow vigorously. During the growing season, apply dilute decomposed liquid fertilizer once every 20 days. Topdressing 2 to 3 times per year is sufficient. In early spring, apply an appropriate amount of cake fertilizer.

4. Pest and disease control: When cultivating Mahonia, ditches should be dredged and drainage should be timely to reduce field humidity, maintain ventilation and light transmission, and enhance plant disease resistance. The main pests and diseases include the noxious owlet moth, bagworm moths, Mahonia anthracnose, and leaf spot disease. For the noxious owlet moth and large bagworm moth, spray with 90% trichlorfon original powder at 1000 times dilution. For anthracnose, spray with 70% thiophanate-methyl wettable powder at 1000 times dilution. During the scale insect stage, spray pesticides such as dichlorvos and isocarbophos.

5. Harvesting and processing: Mahonia can be harvested after 4 to 5 years of cultivation. After the fruit matures, it is blue-green. Pick the fruit and cut the stems. The leaves can be used throughout the year and dried in the sun. Dig the roots every autumn and winter, dry them in the sun, or keep them for later use.