Every cactus is unique, so it’s up to you to figure out how to care for it by paying attention to how it changes whether you water, repot, fertilize, or propagate. Knowing how frequently to water your cactus is crucial for the plant’s survival.
These plants have the wonderful quality of being very tolerant to water neglect. Their leaves or stems will turn pale or yellow if they are neglected too much, though.
Here are some pointers to help you choose how frequently to water your cactus:
Cacti require routine fertilization and watering from March to September, when they are in full growth. To keep them from drying out, water them at least once every week. Only water them when they are fully dry when dormant.
Make sure the topsoil is totally dry before the subsequent watering cycle. To assist you determine the moisture level, you might purchase a water gauge. An alternative is to insert a stick into the ground; if the stick comes up dry, the plant needs water.
Be out for warning signs of overwatered or underwatered cacti. When a cactus is underwatered, it will appear pale, and when it is overwatered, it will appear unusually fat, which finally causes root rot.
When should cacti cease receiving water?
The speed at which the earth dries out is another factor. You might take a chance with another watering if the soil in the pots in your chilly room dries out in a week. Here, I deliberately use the word “risk.” When in doubt, the general rule is to avoid watering. You appear uncertain. Particularly in a cool to cold atmosphere, your plants will survive without water for months without any problems. Therefore, unless we’re talking about little seedlings, I would advise you to forgo further irrigation and to avoid taking any chances. When it comes to watering at this time of year, you really have nothing to gain.
Around the end of September or the beginning of October, I normally stop watering my larger cacti. If all other factors are equal, the soil in their greenhouse dries out more quickly than yours because it receives more air ventilation and heat when the sun shines. Depending on the weather, only my seedlings that are one and two years old continue to receive some water until late October. When the sun shines, it can still get warm in the greenhouse in October, so I want to keep the tiny plants as full as I can so they can more easily withstand the drought through the winter.
Late March or early April is when you can start watering again, but go slowly and give it some time to recover from the initial watering. It is always delightful to observe cacti that had shrunk suddenly swell up a week after receiving their first watering of the year.
In the winter, should cactus be watered?
Cacti require frequent watering during the summer and when they are actively growing. Typically, cacti require less water during the winter’s cooler, dormant months. During this time, you can reduce your watering by at least 50% or possibly more.
I have another article regarding how much water to give your cactus when you water it that matches pretty nicely with this one. Understanding how cactus react to water in their natural habitat can really help you water your plants correctly each time.
How frequently does a cactus need watering?
The most frequent reason for cacti failure is improper watering, whether it is done too much or too little. Cacti have evolved to store water for extended periods of time and can maintain moisture through droughts because they are endemic to arid regions and dry temperatures. They have a limited capacity, which is why over-watering can result in a variety of issues.
When it comes to regularity, watering your cacti will largely depend on the season but also on the variety. Checking the soil is the easiest technique to determine whether your cactus needs water: It’s time for a drink if the top inch is dry. That entails applying the “soak and dry procedure” on cactus.
What is the soak and dry method?
The soak and dry technique is thoroughly wetting the soil until part of it begins to flow out the drainage hole, then waiting until the mixture is nearly dry before wetting it once more. If done properly, this strategy will help them endure a period of under-watering should you need to travel or leave the house because it takes use of their natural tendency to store water (or if you just get busy and watering falls to the wayside, as happens to all of us now and again).
Watering during the growing season versus the inactive season
Like with many houseplants, the season affects how frequently you need water. It becomes more crucial that you get in the habit of examining the soil to determine whether your cacti are thirsty. A healthy cactus needs watering every one to two weeks during the growing season, according to general wisdom. The frequency changes to once every three to four weeks during the off-season.
Even then, it’s crucial to examine the soil. The same way that not all interior spaces and not all cacti are alike. The only way to be certain that your cactus require watering is to carefully examine the soil to determine how dry it is because there are so many different factors.
How can you determine if a cactus has been overwatered or not?
The cactus won’t typically seem radically different from day to day because underwatering typically happens gradually over time.
There are a few indicators, nevertheless, that will let you know if your cactus is submerged.
Signs of an Underwatered Cactus
Knowing the warning signals of an underwatered cactus is crucial for prompt response. Your cactus will have a better chance of recovering if you do this.
The most typical warning indicators of a submerged cactus include:
The Cactus Is Light Green or Yellowish
Since this normally happens gradually over time, the color change might not be apparent right away.
If your cactus begin to become light green or yellowish, keep an eye out for more symptoms of an underwatered plant.
The Spines Are Falling off Easily
A well-watered cactus has roots that go far into the ground and take in water there.
Their root systems do not, however, work correctly while they are underwater because the dearth of nutrients in the soil leads them to wither away.
As a result, the spines become fragile and easily detach.
another typical indicator of a submerged cactus
The Cactus Is Wilting
Due to nutrient deficiency, their spines cannot support the plant adequately, which causes them to lose their shape.
As a result, plants that were formerly upright and in good shape gradually start to sag or droop.
Decay at the Base of the Plant
Roots will cease developing and begin to deteriorate over time if they are unable to absorb enough nutrients from the soil as a result of a lack of water, which will eventually result in decay at the base of the plant.
It’s possible that you won’t immediately notice whether or not your cacti are underwater because this normally happens gradually.
The New Growth on Your Cacti Is Weak and off Center With Older Growth
Lack of nutrients will have an impact on how a cactus develops new limbs.
In this instance, you’ll see that the younger growth is somewhat deformed and less symmetrical than the older ones-another indication that the cactus has been submerged.
In the winter, what should I do with my cactus?
We’ve compiled general maintenance advice to make sure that your cactus, no matter what kind, will survive the upcoming winter.
- Don’t water your cacti excessively. Many cacti can go the entire winter without getting any water, therefore you can let nature hydrate your plants by getting rain. Or, to avoid causing your plant root rot if you keep it indoors, stick to a watering regimen that is at most monthly. Be cautious while watering outdoors because water might freeze and harm your plant’s roots and stems.
- Your cacti will benefit from a rock mulch. Adding mulch to your cactus soil warms the soil for your plants and helps you avoid overwatering. If you maintain frost-tolerant cacti outdoors, you can protect them from the cold by covering the soil with a layer of small rocks.
- Don’t feed your cacti fertilizer. During the chilly winters, a nitrogen-rich fertilizer can be particularly detrimental to young, delicate plants. For the spring and summer, postpone fertilizing your cacti.
- Give your cacti the most light you can. Your plant won’t likely receive the greatest light if you bring it inside. If feasible, place your plant beside a southwest window and add grow lights if you need more light.
In the heat, how frequently should I water my cactus?
The majority of cactus plants’ growth often occurs during the warmer months. They now require additional moisture to support their growth. Plants in the spring and summer require adequate irrigation to prevent wrinkled leaves, pads, and stems as well as to encourage new cell growth, flowering, and fruiting, as necessary. Plants require precisely the right amount of water to survive the late fall and winter seasons when they are in their resting state. Potting soil or in-ground soil should be allowed to dry out in between waterings during this time.
However, plants near a furnace or in direct sunlight will dry out more quickly than plants in other places, and they might need a little extra moisture to tolerate those dry conditions. The typical cactus plant should be watered once a week or more frequently in the spring and summer when plants require extra moisture. This is why having soil that drains efficiently is crucial since any excess moisture can be sent away from delicate roots.
Can a cactus that is overwatered bounce back?
But if you notice any green on your cactus, there’s a strong possibility you can still revive it, regardless of how awful it appears. The task of saving an overwatered cactus is definitely doable. With some patience and some work, you can grow a healthy cactus in a few weeks.
What temperature is too low for cacti?
If you have enough light, cacti are some of the most rewarding houseplants. Few blooms can match them in terms of color, size, or beauty. Space is typically not an issue because most cacti grow slowly. They are extremely resilient and flexible. They do not “thrive on neglect,” unlike what the general public thinks. They “thrive on gentle loving care, like most plants, but they will at least “survive on neglect.”
Except for epiphytic (tree-dwelling) cacti and succulents like the Christmas cactus, rhipsalis, and orchid cacti, which demand less sunlight, greater humidity, and more watering than other species, the general care instructions below apply for cacti and most other succulent plants. They also prefer fertilizer with a higher nitrogen content. Compared to other species, add less sand to your potting mixture. Other succulents such as haworthias likewise favor brilliant indirect light over direct sunlight.
Light
Give cacti and other succulent plants the brightest or most sunny windows you have indoors (four to six hours of direct sun). They will grow abnormally long and thin in low light conditions. Your plants will benefit greatly from spending the summer outdoors in the morning or late afternoon sun, when there is greater air movement and light. The majority of succulents can withstand intense outdoor sun, but they must get used to it. When putting plants outside, place them in partial shade or shadow at first and gradually expose them over the course of a few weeks to the strong late spring and summer sun.
Spiny and woolly species need the greatest sunlight, whilst spineless species typically need shade during the midday hours. If your plant has a reddish tint, it may be because the amount of sun it can withstand is reached or exceeded.
Watering
When you water, make sure to water well and wait until the soil has dried before doing so again. In particular, succulents are vulnerable to rot from excessive watering. If the earth around your plant is already moist, NEVER water it. Pots that are dry weigh less than wet ones. When the soil inside clay pots is moist, they feel chilly and damp to the touch. When the soil has enough moisture for the plant, succulent leaves are solid and plump.
The majority of cacti and several other succulents prefer to maintain a significant amount of dryness during the cooler months of the year (usually October through April). Over this time, drink less water than usual. To encourage new growth in the spring, spray your plants in the early morning hours of warm days. The spines of plants will allow them to absorb moisture. In order to prevent new roots from being stifled by excessively damp soil during the early spring, we also advise watering plants from the bottom of the pot. Fill the plant’s saucer with water, give the soil, pot, and plant around 30 minutes to absorb the moisture, and then drain the extra.
If you embed your plants in a mixture of 50% coarse builder’s sand and 50% peat, they will grow to their fullest capacity if they are in clay pots. This stops the soil from drying out too quickly and enables the roots to grow in the consistent wetness that the peat/sand mixture creates. Make sure there is excellent drainage in the tray that contains the peat/sand mixture.
Temperature
Keep succulents and cacti above freezing in the winter. Some plants require a temperature range of 35 to 40 °F at night (some cacti and other succulents can endure temperatures well below freezing if kept absolutely dry.) A minimum temperature of 50–60 degrees is preferred for more tropical succulents like adeniums, euphorbias, lithops, and stapeliads.
Plants need to be shielded from intense heat in the summer since potted plants’ root systems are more susceptible to harm. Good air circulation and cautious watering will prevent fungal and rot issues in humid and hot conditions.
Fertilizer
From May to September, feed your plants once per month using a fertilizer that contains low nitrogen (10% or less), such as 5-10-5 or 10-30-20. Nitrogen overload promotes excessively quick green but weak development. As the majority of cacti have evolved to thrive in nutrient-deficient soils, always dilute the fertilizer more than the label recommendations suggest.
Repotting
In the spring or early summer, repotte. When young, most plants like annual repotting with just one pot size increase. Without relocating the plant to a larger pot, you can carefully remove the top inch or two of soil after you reach roughly a 6-pot size and replace it with fresh mix. Since succulents are typically heavy plants, especially when potted in clay, moving them into ever bigger containers can be challenging.
Steer clear of soils that contain a lot of peat moss. Peat retains moisture for too long and is difficult to remoisten after being fully dried (a frequent occurrence with most succulents). You can add some coarse builder’s sand to the soil to promote drainage and a tiny amount of peat to the soil to improve texture. As much as 40% sand is appreciated by stapeliads, wooly cactus, and lithops (living stones). The base of the plant should have a top dressing of fine gravel since it encourages greater water absorption into the soil, shields it from excess moisture, and looks good too. For every 3 inches of pot size, add a tablespoon of gypsum and bone meal, if possible.
Use a pair of wooden tongs or a piece of newspaper that has been rolled up to help plants with a lot of spin out of their pots. If the plant is resistant, resist the urge to pull it out because doing so will harm the roots. Try again by striking a hard surface with the pot. As much soil as you can take out without harming the root ball. To prevent rot, always repot the plant at or higher than the prior soil level. You might need to stake species of columns. To give new root hairs time to grow after repotting, wait a week or two before watering.