When Does Spider Plant Bloom? Latest Blooming Period Explained

Spider plant is a perennial evergreen herbaceous plant of the genus Chlorophytum in the Liliaceae family, with clustered cylindrical fleshy roots and short rhizomes, slender drooping branches, suitable for potted ornamental display. Placing spider plants at home has become a fashionable trend, and spider plants stay evergreen all year round, with very high ornamental value. Now let us take a look at when spider plants bloom!

When does spider plant bloom?

Spider plants generally bloom in early May each year, and if conditions are suitable they will bloom throughout the summer. The flowers of the spider plant are white, usually in clusters of 2 to 4, arranged in loose racemes or panicles. The pedicel is 7 to 12 mm long, with the joint located from the middle to the upper part. The tepals are 7 to 10 mm long, with 3 veins. The stamens are slightly shorter than the tepals. The anthers are oblong, 1 to 1.5 mm long, noticeably shorter than the filaments, and often curl after dehiscence.

Why does spider plant not bloom?

1. Spider plant lacks phosphorus: when a spider plant lacks phosphorus it cannot form flower buds, and without flower buds it cannot bloom. When a spider plant reaches its blooming period without forming flower buds, you can bury an appropriate amount of compound fertilizer with higher phosphorus and potassium content near the edge of the pot to promote flower bud formation, which makes blooming more likely.

2. Insufficient sunlight: if a spider plant stays in a relatively dark location for a long time it cannot photosynthesize, and cannot produce enough nutrients to support flower bud growth. Without flower buds it will not bloom. You can move it outdoors to get more sun to enhance photosynthesis.

3. Overly wet watering: although spider plants like a moist environment, long-term overly wet watering, especially during the flower bud differentiation period in winter, means a relatively dry environment should be maintained to promote flower bud differentiation. Therefore, controlling water one month before blooming makes it easier to bloom.

How to make spider plant bloom more?

1. Proper watering: before and after the spider plant blooms, be sure to provide sufficient water. Sufficient water helps the plant grow new stems. You should know that those small flowers all bloom on the stems, and the more stems there are, the better the blooming will be.

2. Supplement phosphorus fertilizer: phosphorus fertilizer can promote the sprouting of flower buds. Applying phosphorus fertilizer appropriately before the blooming period can also promote vigorous plant growth. At the same time, apply a small amount of nitrogen and potassium fertilizer, but mainly phosphorus, diluted with clean water for irrigation.

3. Sufficient light: although spider plants like shade, appropriate light is beneficial for plant growth and blooming. In April, you can place the plant in a half-light, half-shade location, while avoiding strong light exposure.

How to grow spider plant well?

1. Light: spider plants like a semi-shady environment and are very sensitive to light. When exposed to direct sunlight in summer and autumn, the leaves will turn yellow and withered, and even the whole plant may die. In winter, since the sunlight is not strong, spider plants can be given some appropriate direct sunlight.

2. Temperature: spider plants like a warm and humid climate and cannot tolerate severe cold or extreme heat. The most suitable growth temperature is 15 to 25°C, and the winter room temperature must not be lower than 5°C. During hot periods, avoid direct strong light, and during cold periods, more sunlight is preferable.

3. Watering: spider plants like water and have relatively strong drought resistance. From March to September, during the peak growth period, water demand is relatively high, so water and mist frequently to keep the potting soil completely moist. During the winter dormant period, water again after the surface of the potting soil is dry to about 1 cm deep.

4. Fertilizing: spider plants are relatively fertilizer-tolerant plants. Insufficient fertilizer and water can easily cause tip burn and aging, yellowing leaves, and loss of ornamental value. For spider plants that have begun to grow small plantlets, apply nitrogen fertilizer once every half month; well-growing spider plants can also go without fertilizing.

5. Soil: spider plants should use loose, fertile sandy loam soil, requiring soil that contains humus and has strong permeability. For potting, you can use a mixture of equal parts leaf mold or peat soil, garden soil and river sand, plus a small amount of base fertilizer as the substrate.

6. Repotting: spider plants should be repotted once every year in March. If the pot is relatively deep and the base fertilizer is relatively sufficient, they can be repotted once every two years. When repotting, knock the plant out of the pot, cut off dead and rotten roots and excess roots, replace with new culture soil and apply sufficient base fertilizer.

7. Pests and diseases: spider plants generally are not prone to pests and diseases. When problems occur, they are usually root rot caused by water accumulation in the potting soil and poor ventilation, and pesticide spraying should be used promptly for prevention and control. Dense plant clumps with poor ventilation are susceptible to scale insect damage, so prevention should be the priority.

8. Pruning: spider plants should have yellow leaves cut off at any time. In March each year they can be repotted once, cutting off old roots, rotten roots and excess fibrous roots. In early to mid-May, some old leaves of the spider plant can be cut off, which will encourage the spider plant to sprout more new leaves and small spider plantlets.