Blue Beans (Graptopetalum pachyphyllum): Latest Growing Methods and Care Tips Explained
Blue Beans (Graptopetalum pachyphyllum) is a rare perennial herbaceous variety in the Crassulaceae family, genus Graptopetalum, and is also one of the few fragrant succulents. Native to northeastern Mexico, the plant's leaves are light blue and oblong; under strong light and large day-night temperature differences or during low winter temperatures, the leaf color will turn a very beautiful blue-white. Let's take a look together at how to grow Blue Beans!
Blue Beans' Growing Habits
Blue Beans likes a warm, dry environment with plenty of sunlight. It is drought-tolerant and dislikes waterlogged conditions. If kept in a shaded spot for a long time, the plant's shape becomes loose, the leaves become sparse, and it is difficult for it to bloom. Normally, do not water too much, to avoid root rot caused by overly wet soil. During high summer temperatures, make sure there is good ventilation.
Blue Beans' Propagation Methods
Blue Beans can be propagated by division when repotting, or during the growing season the plump, healthy fleshy leaves can be laid flat on sandy soil for leaf cuttings. After planting, keep the potting soil slightly moist; many new shoots will grow from the wound at the base. Once these new shoots are a little bigger, remove them and plant them separately to become new plants.
Blue Beans' Growing Methods
1. Soil: Blue Beans likes sandy loam rich in humus, and can also adapt to poor soil. The potting soil should be loose, fertile, sandy soil with good air permeability. You can mix 3 parts leaf mold, 3 parts river sand, 1 part garden soil, and 1 part furnace slag, and mix in a small amount of bone meal and other calcium materials.
2. Watering: For Blue Beans, follow the principle of “don't water until dry, and water thoroughly when you do,” avoiding water accumulation in the potting soil, otherwise root rot will occur. When the air is dry, you can sprinkle water around the plant, but do not let water accumulate on the leaf surface, especially in the center of the leaf rosette, otherwise it will cause heart rot. In particular, avoid prolonged rain exposure.
3. Sunlight: Blue Beans is tolerant of high temperatures and strong sun, but too much light can easily age the leaves and affect the ornamental effect, so when the weather is hot, it should be placed on a balcony or windowsill that gets sunlight in the morning and evening. Under strong light and large day-night temperature differences or during low winter temperatures, the leaf color of Blue Beans will turn a very beautiful blue-white.
4. Temperature: In winter, place Blue Beans indoors in a sunny spot. If the nighttime minimum temperature is around 10°C and there is a certain day-night temperature difference, you can water appropriately and fertilize as needed to keep the plant growing. If you cannot maintain such a high temperature, you should control watering, keep the potting soil dry, and stop fertilizing to let the plant go dormant; it can also tolerate low temperatures of 5°C.
5. Fertilizing: During the growing season, apply a thin, decomposed liquid fertilizer or a low-nitrogen, high-phosphorus-potassium compound fertilizer about once every 20 days, but not fertilizing is also fine. When fertilizing, do not splash the fertilizer water onto the leaves. Fertilizing is generally done on a clear morning or evening; on the evening of the same day or the morning of the next day, water thoroughly once to dilute any residual fertilizer liquid in the soil.
6. Pests and Diseases: Blue Beans is often affected by rust disease, leaf spot disease, and root-knot nematodes. It can be controlled by spraying with 75% chlorothalonil wettable powder at 800 times dilution, and root-knot nematodes can be controlled with 3% carbofuran granules. Among insect pests, it is affected by the black weevil, which can be killed by spraying with 25% carbaryl wettable powder at 500 times dilution.