Water a cactus thoroughly, allowing the soil to dry completely between waterings, which might take three to four weeks depending on the environment.
Here's a more detailed explanation:
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Let the Soil Dry Out Completely: The most crucial aspect of watering cacti is allowing the soil to dry out entirely between waterings. Cacti are adapted to arid environments and are susceptible to root rot if kept consistently moist. A good indicator is when the top inch or two of the soil is completely dry.
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Water Thoroughly When You Do Water: When you water, water deeply. Ensure that the entire pot is saturated, and excess water drains out of the drainage holes. This encourages deep root growth.
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Consider the Pot and Soil: Use well-draining soil specifically formulated for cacti and succulents. Terracotta pots are excellent because they allow for better airflow and quicker drying times.
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Pay Attention to the Season: Cacti generally require less water during their dormant period (typically winter). Reduce watering frequency significantly during this time. In the growing season (spring and summer), you may need to water more frequently.
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Monitor Your Cactus: Observe your cactus for signs of overwatering or underwatering. Overwatering can lead to soft, mushy spots, while underwatering can cause shriveling. Adjust your watering schedule accordingly.
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Drainage is Essential: Ensure your pot has drainage holes. If it doesn't, excess water will accumulate, leading to root rot.
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Evaporation Matters: Remember that water evaporation rate varies significantly, and does not evaporate much on its own, so let the soil dry out before watering again.
