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If more than one seedling sprouts in the same pot, then snip the weakest seedlings with scissors. This will make room for the healthiest seedling. You can also transplant all of the seedlings into separate containers, but keep in mind that this is riskier. Once your plant reaches maturity, transplant it to a larger pot whenever the roots come out the drainage hole or press against the sides of the container. The soil should remain moist at all times, but never soggy. If the sensitive plant is in a dry room, mist it with water occasionally, or place it on a humidity tray. Sensitive plants are an invasive weed in many areas. Unless you are in one of their native habitats in tropical America, you may want to grow sensitive plants indoors. Gardeners worldwide report the plant taking over their lawns. In Australia, you are legally required to minimize the spread of mimosa pudica seeds off your property. Dilute a balanced fertilizer to half the strength recommended on the label. Apply to the soil once a week during the growing season, and once a month during winter. Since it is a tropical plant, Mimosa pudica will grow best if nighttime temperatures are 70ºF (21ºC) or higher. If temperatures fall below 65ºF (18ºC), move the plant to a warmer room or keep the plant warm in other ways. Adult plants can survive temperatures as low as 40ºF (4.5 °C), but are at risk of damage or death. Keep an eye out for yellow leaves and stems, which are signs of possible cold damage. It's normal for the stem to fall over and creep along the ground once the plant matures. Provide a trellis or sturdy plant to support it, or allow enough horizontal space for it to grow. Some sensitive plants grow more than 1 meter (3 ft) high or 2 meters (6.6 ft) horizontally, but in temperate zones they will more likely reach half this size. Mimosa pudica can survive for at least two years in tropical climates, but are usually annual plants in temperate zones. Even if your plant survives after its first bloom (usually in summer), you may have better results letting it die and collecting its seeds for next spring. To collect seeds, let the pods dry on the plant, then break them open and collect the seeds. The sensitive plant is not particularly prone to disease, but it may become infested with some common pests, such as red spider mites, mealy bugs, and thrips. These can be removed by spraying the plant with a direct stream of water or neem oil every few days. Avoid using insecticidal soaps, as these can turn the leaves of the plant black.
Transplant to other pots when necessary. Keep the soil moist. Keep the plant indoors (recommended). Fertilize regularly. Protect against cold. Provide space for the plant to grow. Watch its lifespan. Prevent disease.