How to Grow Magnolia: Detailed Guide to Cultivation Methods and Precautions

Magnolia is a deciduous small tree with purple-brown branches, and its wood is fragrant. It originally grew in the mixed forests of central China, so it likes light but also tolerates shade, prefers warmth and humidity but can also tolerate cold, and has low requirements for its growing environment. So when growing it at home, how should magnolia be cultivated? And what should be noted?

How to Grow Magnolia

Magnolia likes moisture but fears waterlogging, and likes full sunlight, good ventilation, and acidic soil. Usually water it with some ferrous sulfate and apply light fertilizer.

1. Soil: Magnolia likes fertile, moist, well-drained sandy soil, is not drought-tolerant, and avoids alkaline conditions; it grows poorly in dry, alkaline, or clay soil.

2. Watering: Magnolia avoids both drought and waterlogging. Usually ensure a supply of water and frequently spray the leaves to increase air humidity, so as to avoid yellowing and leaf drop.

3. Sunlight: Magnolia likes light and tolerates slight shade, so pay attention to light conditions in normal care and let magnolia receive sufficient sunlight.

4. Temperature: Magnolia likes a warm, humid climate and can also tolerate cold, but when winter temperatures are relatively low it should still be moved indoors for insulated cultivation.

5. Fertilizing: Magnolia likes fertilizer, so fertilize in time. Apply fertilizer once before and once after the flowering period, mainly phosphorus and potassium fertilizer. From October to November each year, apply decomposed manure or barnyard manure as a base fertilizer. After flowering, during the period of budding and shoot growth, apply 2 to 3 topdressings of quick-acting nitrogen fertilizer.

6. Pests: The main pests of magnolia are cottony cushion scale on pittosporum, sooty mold, and so on, which reduce ornamental value. Spray 1-3 degrees Baumé lime sulfur mixture; during the nymph hatching period, use 40% omethoate emulsifiable concentrate at 1000 times plus 10% imidacloprid wettable powder at 1500 times; when adults appear, use Kuangshajie 800—1000 times solution or 40% Supusha emulsifiable concentrate at 1500 times solution for uniform spraying. Adding an appropriate amount of diesel oil when spraying can increase its penetrability, and the solution must be sprayed thoroughly and evenly.

7. Pruning: For magnolia to form a tree shape, it must be suckered and pruned, which facilitates the growth of the magnolia's tree form.

Magnolia Cultivation Methods and Precautions

I. Soil Requirements for Magnolia

1. It likes fertile, moist, well-drained sandy soil.

2. It is not drought-tolerant and avoids alkaline conditions; it grows poorly in dry, alkaline, or clay soil.

3. The roots are fleshy and fear waterlogging; wound healing ability is poor, and transplanting does not easily survive.

II. Cultivation and Care of Magnolia

1. Cultivation management is simple; pay attention to preventing drought and waterlogging, and fertilize in time.

2. Transplanting can be done in autumn or before early spring flowering. Small seedlings can be dipped in mud slurry, and large seedlings must be kept with a soil ball.

3. Apply fertilizer once before and once after the flowering period, mainly phosphorus and potassium fertilizer.

4. In summer high temperatures and autumn dry seasons, maintain soil moisture.

5. After flowering and before new shoots bud, prune dead branches and dense branches and cut back excessive long branches.

III. Water and Fertilizer Regulation for Magnolia

1. Magnolia is drought-tolerant but fears waterlogging. Usually ensure a supply of water and frequently spray the leaves to increase air humidity, so as to avoid yellowing and leaf drop.

2. Magnolia likes fertilizer. From October to November each year, apply decomposed manure or barnyard manure as a base fertilizer. After flowering, during the period of budding and shoot growth, apply 2 to 3 topdressings of quick-acting nitrogen fertilizer. In the dry season, mulch around the root zone and water appropriately. The next year it can be expected to have abundant flowers and lush leaves.

IV. Pest and Disease Control for Magnolia

1. Magnolia has relatively few pests and diseases. Just pay attention to water control, promptly prune diseased leaves, and maintain ventilation.

2. In severe cases, appropriately increase the spraying of insecticide.

How to Prune Magnolia

1. During orchid cultivation, pruning must be carried out continuously. When old leaves turn yellow and withered, they should be cut off in time to facilitate ventilation, and some leaves with dried tips should also be cut off. In particular, leaves damaged by pests and diseases need to be removed in time to avoid contagion. When cutting off leaves with viral disease, do not use the scissors again to cut healthy leaves, to prevent virus transmission. If the same pair of scissors is used, it must be disinfected.

2. After magnolia flower buds emerge from the soil, if there are too many flower buds, keep the strong buds and remove the remaining thin, small flower buds. It is suitable to keep 1-2 flower buds per pot. If there are too many flower buds, it will both make that year's flowers bloom poorly and consume too much of the parent plant's nutrients, affecting the next year's flowering. Generally, orchid flower buds may not be cut off.

Magnolia Propagation Methods

I. Seed Propagation

1. Raising Seedlings

Select seeds from robust plants as parent seed. In early to mid-September, mix the harvested mature seeds with coarse sand, rub repeatedly to remove the red oily layer, rinse with clean water, dry, then mix with fine moist sand for low-temperature treatment. Generally choose a sheltered, sunny spot, dig a pit, mix in fine sand at 2-3 times the seed volume, cover with grass to retain moisture, check frequently, and keep moist. When the seeds crack and show white, sow them in time in the seedling bed. Open furrows at a row spacing of 30 cm and a furrow depth of 3 cm. After sowing, cover with a little soil and keep moist; seedlings can emerge in about 1 month. During sand storage, pay attention to preventing water accumulation and mildew.

2. Transplanting

After 2 years, when the seedlings are 80 - 100 cm tall, they can be transplanted. Lift and plant the seedlings as you go.

3. Grafting

Grafting can be done throughout the growing season, but the survival rate is highest when grafting in late May. Production areas mostly use the bud grafting method. For scions, choose branches that are well developed, grow vigorously, have dormant buds, and are free of pests and diseases. One-year-old scions are best. The rootstock and scion should be similar in thickness. Graft in the afternoon on a clear, windless or slightly breezy day. When grafting, insert the bud piece into the cut on the rootstock so that the bud piece fits tightly against the bark layer of the rootstock, tie it firmly with string, and seedlings will emerge in half a month.

4. Cutting Propagation

Choose branches more than two years old, cut them into sections about 60 cm long, remove the leaves, and on cloudy and rainy days in summer and autumn insert them into a moist seedling bed, burying 20 - 30 cm into the soil. Firm the soil and water, and they can survive; they can be transplanted the next year.

Magnolia is a very good early-spring ornamental flowering tree. Every year in early spring when magnolia blooms, purple-red flowers cover the branches, the blooms are huge, and the floral scent is fresh. Because magnolia is a woody plant, it is not very suitable for home pot cultivation; it is best grown in courtyards or gardens.