Is the ornamental tree Aglaia odorata (mock lime) toxic? Cultivation methods, precautions and solutions for leaf drop

Aglaia odorata aliases: Sijimi (four-season Aglaia), Suimi (broken-grain Aglaia). Aglaia odorata is a type of ornamental tree species, with small leaves and small flowers; when it blooms the flowers are extremely fragrant, and it stays evergreen year-round. Because it is easy to grow and carries a delicate fragrance, it is mostly planted in homes. So what are the cultivation methods and precautions for Aglaia odorata? Is it toxic? What should be done if it drops leaves?

Aglaia odorata belongs to the Meliaceae family and the genus Aglaia; it is an evergreen shrub or small tree, native to subtropical Yunnan, Fujian and other places, and distributed in Guangxi, Sichuan, Guizhou and Yunnan.

Aglaia odorata has dense branches and leaves, with fresh green and glossy foliage; it blooms multiple times within a year, most abundantly in summer and autumn. When in bloom it gives off a delicate fragrance that spreads all around, with a scent resembling that of orchids. The tips of the small branches often bear star-shaped rusty scales; the pinnately compound leaves are alternate, and the flowers are yellow, extremely fragrant, about 2 mm in diameter. The pedicels of the bisexual flowers are slightly short and thick, the calyx is 5-lobed, and there are 5 petals, oblong; the berry is nearly spherical, 10-12 mm long, and the flowering period is between summer and autumn.

Aglaia odorata adapts to warm and humid climatic conditions, and mature plants need plenty of sunlight. In southern courtyards, Aglaia odorata is also an excellent ornamental tree.

Cultivation methods and precautions for Aglaia odorata

1. The temperature must be suitable

Aglaia odorata likes warmth, and the higher the temperature, the more fragrant the flowers it produces. Generally speaking, when the temperature is above 30°C and under sufficient sunlight, the flowers produced are strongly fragrant; conversely, in an environment below 30°C, if it is also in a shaded place with insufficient light, the flowers produced will not be as fragrant as those at high temperatures. To grow Aglaia odorata well, the suitable temperature range is between 20°C and 35°C, and during the period from June to October it can bloom as many as 5 times.

2. Light must be sufficient

Aglaia odorata should be placed in a sunny place in all four seasons. If it is placed in a courtyard or on a balcony with ample light and good ventilation, with more than 8 to 12 hours of light per day, the plant's leaves will be deep green, the branches will grow thick and strong, it will bloom many times, the flowers will be bright yellow, and the fragrance will be relatively rich. If Aglaia odorata is kept in an environment with insufficient sunlight and shade, the plant's branches and leaves will grow leggy and weak, the number of blooms will decrease, and the fragrance will be faint.

3. Fertilization must be reasonable

Aglaia odorata has a strong flowering capacity and blooms many times, so nutrients must be replenished in time. After each bloom, nutrients should be replenished promptly; insufficient fertilizer is the main reason Aglaia odorata only grows leaves without blooming, or drops leaves and buds. Therefore, when the temperature rises, Aglaia odorata should be moved outdoors for care, and after one week the soil should be loosened and some dilute nitrogen fertilizer applied; either 10% to 20% rotted cake fertilizer water or human excrement and urine can be used, and afterwards a liquid fertilizer should be applied about every 10 days to promote the growth of branches and leaves.

Starting from June, Aglaia odorata enters its vigorous growth and flowering period, until mid-October. About every 15 days, a relatively concentrated fertilizer based mainly on phosphorus fertilizer should be applied, or every 15 to 20 days a 0.3% potassium dihydrogen phosphate solution should be sprayed, which will make the blooming more abundant. In particular, note that during the flowering period phosphorus fertilizer must be the main type, otherwise the situation of only growing leaves without blooming will occur. During the flowering period from June to October, if fertilization is insufficient, not only will the number of blooms decrease and the flowers not be fragrant, but the flower buds that have already appeared will also wither and fail to open.

4. Watering must be timely and appropriate

The number of times Aglaia odorata is watered must depend on the size of the plant, changes in climate and the placement location, and should be done timely and appropriately. Applying extra phosphorus and potassium fertilizer before flowering, with frequent scattered sunlight and moderate watering, will make the flowers strongly fragrant when they bloom. Summer is the peak growing season for Aglaia odorata, and its water demand increases accordingly; generally it should be watered once a day. In hot, clear weather, watering once in the morning and once in the evening each day is sufficient. If it lacks water, the leaves will turn yellow and even fall off. If there is a rain shower, after the rain the pot should be tilted to pour out the water, to prevent root rot.

5. Pruning and repotting

Aglaia odorata grows robustly, grows quickly, has strong sprouting ability and consumes a lot of nutrients. To encourage prolonged blooming, during its growing season the crossing branches, leggy branches, diseased branches and weak branches should be properly cut away; especially in autumn, overly dense branches and dry, withered branches should be cut away in time to improve the plant's ventilation and light transmission, which helps flowering. After each bloom, pinch the tips in combination with the tree shape, so that it produces more side branches; this can make the plant's shape graceful, its blooms abundant and its fragrance rich.

Potted Aglaia odorata generally needs to be repotted and have its soil changed once every two years; repotting should preferably be done when it is moved outdoors after Grain Rain. Aglaia odorata likes moist, fertile, loose sandy loam, and slightly acidic soil is preferable. A nutrient soil can be mixed from 25% peat soil, 50% leaf mold and 25% river sand; when repotting, be careful not to break up all the old soil, remove part of the old soil where there are no roots, cut off rotten roots, then add new culture soil, and place a small amount of hoof pieces at the bottom of the pot as base fertilizer. After potting, water once thoroughly, until a little water flows out from the bottom of the pot; then place it in a cool place for care, and after about 15-20 days it can be moved to a place with sufficient light for normal care and management.

Is Aglaia odorata toxic?

Aglaia odorata is not toxic and can be placed indoors for a short time, but it grows better in an environment with ample sunlight, sufficient fertilizer, and good ventilation.

Analysis of the causes of Aglaia odorata dropping leaves and how to handle it

1. Watering: overwatering prevents the root system from breathing, causing suffocation and root rot. Water cannot be conducted to the leaf surface. What shows up is that at first the lower leaves curl, dry up, turn brown and fall off, and then the upper green leaves also fall off within a short time. Long-term lack of water causes the root system to die; if it is then watered thoroughly, a large number of leaves will fall within a short time and the plant will die. Watering should strictly follow “see dry, see wet”: do not water when not dry, and water thoroughly when watering. Basically, water thoroughly once every 2 days.

2. Fertilization: Aglaia odorata has certain requirements for fertilizer, especially needing sufficient fertilizer during the growing period; if fertilizer is insufficient, the leaves will also turn yellow and fall off. Fertilization should follow the principle of applying thin fertilizer frequently, especially when topdressing begins in spring, when concentrated fertilizer should be avoided. Topdressing should preferably be applied once every 7-10 days, and an appropriate amount of superphosphate should also be added to the fertilizer water, which benefits the growth of Aglaia odorata.

3. Light: Aglaia odorata likes light and is generally grown under bright scattered light. If the indoor location where it is placed is relatively dark, it will affect the growth of Aglaia odorata, causing yellowing and leaf drop. Aglaia odorata should be placed indoors in a ventilated place with scattered light. It can be exposed to morning light every day, and moved indoors when the sun is high at noon. When the sun is about to set, let it see the evening sunlight. This process can last about half a month, giving Aglaia odorata a period to adapt.

4. Pests and diseases: leaf spot disease caused by infection with fungi and other pathogens easily causes local necrosis of the leaves, with yellow spots or patches appearing, and in severe cases the whole leaf withers, yellows and falls off; after infection by mosaic virus, yellow-green mottled patches appear on the leaves; damage by scale insects, red spider mites, etc. Every 15-20 days, spray the leaf surface once with a clarified liquid leached from a mixture of 25-30 times dry, pure plant ash and superphosphate, or a 0.1% clarified lime water, for pollution-free control, to protect the branches and leaves and prevent damage from various pests and diseases.

Solutions:

If large-scale leaf drop occurs after watering, the Aglaia odorata pot can be raised on a prop, and the surface soil in the pot can be pushed aside, taking care not to damage the root system. Stop watering and fertilizing, place it in a ventilated place, and only spray water on the leaf surface in the morning and evening. This speeds up the evaporation of moisture in the pot; after Aglaia odorata stops dropping leaves, it can gradually be returned to normal management.

Placing Aglaia odorata in the home

Aglaia odorata likes warm places with plenty of sunlight; in winter it can be placed on an indoor windowsill, in the living room or in the study, and in the other seasons it can be grown on a balcony or in a small courtyard.