Watering and fertilizing cacti and succulents It is one of the most important aspects to keep these plants healthy, vigorous and full of life. Although they are known for their resistance and for requiring little care compared to other plants, they offer a special challenge in terms of proper water and nutrient management, since they mostly come from arid environments where they have developed unique strategies to survive.
Why do cacti and succulents require special care?
The group of succulents includes a large number of species, among which are cacti (Cactaceae), as well as plants such as agave, aloe and many others. These plants are characterized by having tissues capable of store water, whether in leaves, stems or roots, which allows them to withstand long periods of drought. Throughout their evolution, cacti, especially those native to America, have developed thorns instead of leaves to reduce transpiration and protect themselves from the intense sun. African succulents, on the other hand, tend to store water primarily in their leaves.
Furthermore, their roots are usually shallow or widespread, allowing them to quickly capture water from occasional or scarce rainfall. However, this adaptation makes them an excess of water be especially dangerous, as it can quickly cause rot.
How to water cacti and succulents optimally
Proper watering of cacti and succulents requires understanding one basic rule: less is moreIt's better to underwater than overwater. Excess water usually results in rotten roots and plant death, while a lack of water rarely causes irreversible short-term damage.
- Irrigation frequencyThere is no specific rule, as it depends on several factors such as the type of plant, the season, the substrate, the size of the pot, sun exposure, ventilation, and climate.
- Summer: The most active period. In soil, water once a week if it doesn't rain. In pots, water only when the substrate feels dry; you can increase the frequency if the pot is small or made of clay, which lose moisture more quickly.
- Spring and fall: The frequency is low. If it rains, it's often not necessary to water. If it doesn't rain, you can add water every two weeks.
- WinterWatering should be reduced to a minimum or eliminated, especially if temperatures drop below 10°C. Only in warm interiors may some species require moderate watering, every 3 or 4 weeks.
To check if it's time to water, insert a stick or finger into the soil. If it comes out dry and clean, water; if not, wait a few more days. This simple technique prevents most overwatering problems.
Practical tips according to the type of container and substrate
- Plastic pots: They retain more water; water less frequently.
- Clay or terracotta pots: They allow greater evaporation and aeration; they may require more frequent watering, especially outdoors.
- SubstratesAlways use well-draining mixes rich in coarse sand, perlite, or gravel, and low in organic matter. Clay or compacted substrates retain too much moisture and increase the risk of rot.
- DrainageAll containers should have holes to allow excess water to drain. Avoid saucers with standing water under the pot.
Characteristics of irrigation water
El ideal water For cacti and succulents, it's soft and pH-neutral. Hard water, with excess lime or chlorine, can stain leaves and affect growth. If you only have tap water, you can let it sit for 24 hours to allow the chlorine to dissipate and add a few drops of vinegar or citric acid to reduce alkalinity. Don't let the pH drop below 4. Monitoring is especially important if you grow sensitive species.
When is it best to water?
- Summer: Do it at dusk, when the temperature has dropped and the water is absorbed better.
- Autumn and winterIf watering is necessary, do so during the warmer hours of the day to prevent moisture and nighttime cold from causing problems.
Fertilizing cacti and succulents
Although originating from nutrient-poor environments, Potted or garden cacti and succulents will deplete the nutrients in the substrate. over time. Therefore, applying regular fertilizer is essential to maintain vigor and stimulate flowering. If you want to learn more about how to use the right fertilizer, You can check when to use liquid fertilizer.
- Start of subscription: Do this when you notice signs of active growth—new shoots, flower buds—usually in early spring. Stop fertilizing in winter.
- FrequencyOnce a month is usually sufficient during the growing season. The dosage should be low, and it's preferable to use liquid fertilizers diluted in the irrigation water specifically for cacti and succulents.
- Type of fertilizerDuring flowering, use fertilizers rich in potassium to stimulate flower production. At other times, opt for a fertilizer balanced in nitrogen, phosphorus, and potassium. Be careful not to use too much nitrogen, as it leads to weak stems and tissues and fewer flowers.
- Avoid the excessToo much fertilizer can be as harmful as too much water. When in doubt, it's better to apply less.
Fertilizing is especially important when growth is slow, plants lose color, or flowering is scarce.
Additional care and tips for successful cultivation
- LocationPlace your cacti and succulents in brightly lit locations. Many require full sun, although some succulents may prefer partial shade. Learn about the specific needs of each species.
- Transplants and spaceIf you want your plants to grow, give them enough space. Small pots restrict growth and can promote salt buildup.
- ReproductionMost succulents can be easily propagated from cuttings. Cacti typically flower when they reach a certain level of maturity, and proper nutrition can promote flowering.
- damage preventionSunburn can occur if placed near windows where the magnifying effect intensifies the sun's rays. Be careful with sudden changes in location.
With these tips and careful observation, it's easy to ensure your cacti and succulents thrive, and hopefully, you can enjoy their spectacular blooms. Continuing to pay attention to the substrate, the quantity and quality of water, and the type of fertilizer will allow you to maintain healthy and resilient plants for many years. If you have any questions, share your experiences or Consult experts to further improve the care of your cactus and succulent collection..
