Self-watering pots are containers with a bottom reservoir or outer pot that stores additional water. When necessary, water is drained from the reservoir into the root systems of the plants. Frequently, plastic is used to make these containers. The majority of self-watering containers have a storage capacity of a few days or longer. These containers can be excellent for plants that must remain moist and practical for those that require frequent watering. Additionally, they are in handy for those who frequently forget to water their plants. For plants that demand a dry medium, such cacti and succulents, they are often not the best choice. Succulents and cacti may be subject to root rot if the soil is overly damp. Extra caution must be taken to avoid overwatering the plants if utilizing for succulents and cacti.
Pros: Ideal for plants that require frequent watering and those that enjoy moist soil; practical for those who frequently forget to water their plants; can lessen the need for frequent irrigation
Cons: Most cacti and succulents or plants that want to stay dry or need a dry soil won’t grow well in these sorts of containers; it also takes extra care to prevent overwatering when using these types of containers for succulents.
Which plants should not be grown in self-watering pots?
In this part, I won’t in any way discourage you from purchasing a self-watering planter. Nevertheless, it’s usually a good idea to consider a product from both angles before making a purchase. Here are several traps you need to be aware of.
Hot Weather Can Make the Water Evaporate
You might find yourself replenishing the planter more frequently in warm areas in particular because the water will evaporate more quickly. That is irritating because it negates the majority of the benefits of owning a self-watering planter.
Not Good for All Types of Plants
A self-watering planter is appropriate for many houseplants, as I said in the introduction. These include herbs, garlic, cabbage, carrots, and tomatoes, as well as other tropical plants and vegetables. If you enjoy annuals, they ought to thrive in a self-watering pot. Perennials, particularly hostas and Japanese irises, share the same characteristics.
However, plants that require extremely moist soil don’t fare as well in a self-watering planter. The self-watering planter can cause some indoor plants to dry out and overall suffer since this way of watering, from the bottom up, rarely provides as much moisture as they require.
Which houseplants are NOT great candidates for a self-watering container?
- One example is the umbrella papyrus/palm, Cyperus alternifolius, which is regarded as semi-aquatic. It grows best with a big, full saucer underneath it and prefers a lot of humidity in the air.
- Another semi-aquatic plant that prefers more moisture and water is the spike moss, commonly referred to as living moss or the Selaginella family of plants. Because the plant’s roots are shorter than those of other species of houseplants, using conventional potting soil inhibits water from reaching the roots.
- Isolepis cernua, the fiber-optic plant, gets its name from the way its inflorescences resemble fiber optics. It’s yet another semi-aquatic plant that can’t grow in a self-watering pot. Instead, place a saucer or basin filled with water underneath the plant.
African Violets (Saintpaulia)
An indoor ornamental plant called an African Violet blooms most effectively when watered from the bottom up. It’s because watering a plant from top to bottom might cause the plant’s crown to decay.
It is also advantageous to use distilled water to enhance the health of African violets. To get rid of salt and dust, we can occasionally mist the leaves of African violets with water.
Water that is at room temperature must be used to water African violets. It is always recommended to choose self-watering pots because plants are vulnerable to quick leaf chilling. Ring Spots may appear on the leaves of African Violets if we soak them in cold water that is below 55 degrees Fahrenheit (a condition of discoloration of leaves).
Peace Lilies (Spathiphyllum)
Once per week irrigation is necessary for Spaths or Peace Lilies. For my Peace Lilies, I like to use self-watering pots. The Peace Lillies are kept moist by a self-watering plant, which is the main cause of this.
Peace Lilies prefer high humidity and require moist soil to grow. The plant would receive the necessary amount of water from a self-watering pot while avoiding the risk of overwatering.
I frequently fill the water reservoir all the way to the top to ensure that my Peace Lilies have enough water. I’ll also make sure the dirt is completely dry before adding more soil to the pot.
Pothos or Devil’s Ivy (Epipremnum Aureum)
Pothos grows well in a self-watering container for many of the same reasons as other plants do. Root rots can be prevented with a self-watering planter. Pothos either experiences it as a result of water shortage or excessive watering.
Our Potho can develop fungal infections and wilt its leaves if we overwater it. To avoid these issues, it is recommended to choose self-watering pots. Always allow the soil time to dry up in self-watering pots before adding more water to the reservoir. It is anything that facilitates Pothos’ nutrition acquisition.
I frequently add new dirt to my Pothos, especially when gaps appear. It is a great technique to occasionally provide the plant the nutrients it needs.
Fiber Optic Plant (Isolepis Cernua)
The fiber optic plant, sometimes referred to as low bulrush, is a semi-aquatic plant in its natural habitat. Therefore, this plant needs enough water to stay healthy. Water gardens are where most people cultivate their fiber optic plants. They can, however, also grow well in self-watering containers.
It is preferable to fill the reservoir all the way to the top because it needs a lot of moisture. We can’t allow the soil of a fiber optic plant dry out like we can with Pothos and other plants. It will cause it to wilt.
In a self-watering pot with medium sunlight, I’ve put my fiber optic plant. It aids in keeping my plant healthy in its self-watering container.
Umbrella Palm (Cyperus Alternifolius)
Umbrella Palms need a lot of water, just like Fiber Optic Plants need. It is a semi-aquatic plant as well. If we plant an umbrella palm in a self-watering planter, it can thrive.
We need to fill the reservoir all the way to the top and refill it frequently because it mostly grows in water. The plant can be replenished by regularly checking the pot and giving it water.
We need to make sure the roots of an umbrella palm are kept moist and damp. It will negatively impact the plant if its roots are dry. Brown spots appear on the tops of the umbrella palms’ leaves as a result of dehydration. This problem is readily solved if we have our umbrella palm planted in a self-watering pot.
Ferns (Polypodiopsida)
When we give ferns enough moisture, humidity, and peaty soil to grow in, they do well. By using water that is at normal temperature, we can guarantee the wellbeing of our ferns.
Ferns typically perish as a result of either inadequate or excessive irrigation. When ferns experience under-watering, the leaves turn yellow and become dry. On the other side, over watering can cause the leaves to become yellow and the roots to decay.
However, we can use self-watering pots to provide our ferns enough water. Additionally, we must routinely assess the plant’s needs for moisture.
We must refrain from watering the plant from the top once we have planted our ferns in self-watering pots. However, we can top-water our ferns once or twice a year to clean their foot system.
Selaginella
The plant selaginella requires high humidity levels. These plants may wilt and perish if there is not enough moisture. A Selaginella plant typically dies due to uprooting, which happens as a result of dehydration.
The plant may be able to recover its health if we give it enough water. To assure their growth and to offer a consistent supply of water, I have placed Selaginella plants in a self-watering pot.
Pitcher Plants (Sarracenia)
Similar to other predatory plants, pitcher plants demand particular care and attention. For them, having a suitable drainage system is crucial to their ability to develop. In addition, we need to guarantee that it gets enough water.
We can always rely on self-watering pots for that reason, especially in warmer climates. To make sure the plant receives the right amount of water in such locations, we must fill the reservoir each morning. For the self-watering container, we can also set up an automatic watering system.
For a pitcher plant, it is best to choose a self-watering pot that is between 16 and 20 cm wide. Here, the reservoir needs to be routinely topped over with four to six cm of water.
Cherry Tomatoes Plant
When we plant cherry tomatoes in large pots, they do well. The soil will have greater space to absorb water thanks to it. To provide us with a good crop, they require more water.
Split tomatoes and blossom end rot can both result from under-watering. Similar effects on the plant might also come from overwatering. Therefore, it is crucial to give the plant consistent amounts of water and nutrients to preserve its health. The soil must be moist, but that does not mean it must be humid.
Choosing a self-watering container will help us to give our Cherry Tomatoes a plentiful supply of water. We can water the plants automatically as well.
Basil (Ocimum Basilicum)
Basil, which is often used in cooking, needs plenty of sunlight and mild weather. When the weather is hot and dry, it grows best. If it’s freezing outside, the plant might not make it.
By giving the plant a good environment to flourish in, we can prevent these issues. Basil plants can benefit from indoor cultivation, proximity to a windowsill, or exposure to fluorescent lighting.
Our basil plants, especially those kept inside, might benefit from a self-watering pot by getting the necessary amount of moisture. When the reservoir is empty and the ground is completely dry, we can replenish it.
Cilantro or Coriander (Coriandrum Sativum)
For survival, cilantro need a lot of moisture. The majority of people grow them in water, particularly in large pots. However, we can also use self-watering containers to cultivate our cilantro plants in soil.
The leaves of the cilantro plant get moist as we water it from top to bottom. Powdering mildew can grow on moist leaves. Self-watering pots can help us solve this issue because they don’t wet the leaves.
Size
Choose a pot that is just big enough for the plant to grow in, but not too big. The circumference of the appropriate pot is 5–10% greater than the size of the plant. Choose pots with a maximum excess space around the sides of an inch or two. The delicate roots will spread if the pot is too big before the plant has a chance to develop. There won’t be any room for the roots to spread in a pot that is too tiny.
Style
The ideal pot should not only complement your style and decor but also the physical properties of the plant. Tall pots look excellent with upright-growing succulents, like aloe. Low-growing cultivars, like Echeveria, look fantastic in little pots. Not to mention spillers with trailing growth tendencies like String of Pearls. Spillers in shallow pots or hanging plants look fantastic and grow well.
Material
There are many different types of materials for pots. The most prevalent materials are wood, terracotta, metal, ceramic, and resin. Terracotta or ceramic pots work best for succulent plants. Both of these materials allow for proper air and water circulation because they are both breathable. Just keep in mind that both ceramic and terracotta are weighty, especially after adding soil and plants.
Pick resin or plastic pots for larger plants, especially ones you plan to move around. Your back will thank you for using those lighter pots as you move or reposition plants.
Drainage
Before you plant and cultivate succulents, the most important thing to understand is that they don’t like a lot of water. Even before you develop a watering schedule, this is relevant. Without adequate drainage, water that accumulates at the bottom of a container without anywhere to go may cause root rot in your succulent.
The ideal pots for succulents, regardless of design, are planters with drainage holes in the bottom. Since many succulent planters lack drainage holes, you can use any of them as long as you keep in mind to water succulents sparingly and keep an eye on them frequently.
Self-watering pots—are they suitable for jade plants?
This circular planter pot supports your jade plant in flair and utility. Your succulent plant can remain hydrated with the self-watering feature for up to two weeks. The pot offers a lot of ventilation, which helps stop the formation of mold or fungus. The raised dirt bed also prevents the roots from being wet by keeping them out of the water. This planter is a versatile solution for your jade plant because it can be used indoors and outdoors.
Do plants in self-watering pots suffocate?
Despite the fact that plants actually absorb water from the bottom up, most people water their plants from the top down. On the other hand, self-watering planters typically include water reservoirs at the bottom of a pot that may be pulled from as needed by a process known as capillary action. Basically, the adhesion, cohesion, and surface tension of the water cause a plant’s root system to draw water from the reservoir and carry it upward (thank you, physics!). The water can be utilised for photosynthesis and other vital plant functions once it reaches the leaves of the plant.
Overwatering is a major contributor to root rot and plant mortality in indoor plants because it causes the water to collect at the bottom of the pot, oversaturate the roots, and prevent capillary action. However, self-watering pots avoid drowning roots since they keep the water source apart from the real plant.
If a houseplant doesn’t receive enough moisture, the moisture it does receive has a tendency to pool on the soil’s surface, drying out the roots underneath. This is also not a problem as long as your self-watering planter is routinely refreshed with water.
Do you fill a self-watering planter’s base with rocks?
Physical Properties of Container Media, North Willamette Research and Extension Center, Oregon State University
“Regardless of plant height for a particular media, the perched water table is constant. Therefore, it is not a good idea to use the same medium in large and small containers.
Master Gardeners of Monterey Bay, Agriculture and Natural Resources, University of California:
from the Urban Programs Resource Network at the University of Illinois Extension
Drainage Is Essential to Plant Health: How to Create Successful Container GardensChoosing a Container for Planting
“Leave the pebbles out of the bottom of the pot or individual liners.”
It is a fallacy that adding a layer of gravel to the soil-filled bottom of a pot can increase drainage.
Extra water “perches or accumulates” in the soil just above the gravel rather than quickly draining into the gravel. Water builds up till there is no more room for air.
Excess water sinks into the gravel below once all the soil’s air spaces are full. Gravel at the bottom therefore does little to prevent soil above it from becoming saturated due to overwatering.
According to Growing Media for Greenhouse Production, Agricultural Extension ServicePB1618 from the University of Tennessee, Institute of Agriculture, reducing the depth of the pot actually increases water retention and reduces drainage, so adding gravel to the bottom of a pot actually has the opposite effect:
Height of the Media Column/Containers
The size of the growth container is another element that influences air/water relations in the root zone in connection to media. The amount of air and water that a given media can hold in a container depends on the height of the media column. The proportion of water to air spaces decreases with increasing column height.
This is particularly crucial in the development of plugs because poor root zone aeration results from small cells that drain very poorly or not at all.
There will always be some saturated material at the bottom of the container after drainage in all containers. This is caused by a water table that is said to be perched. The saturation zone makes up a bigger portion of the growing media’s total volume in a very small container, like a plug cell.
The sponge has a total porosity of 80% and can contain 950 ml of liquid when completely saturated.
A volume air space of 4.2 percent results from holding the sponge such that it is 2 inches high. This causes roughly 50 ml of water to drain out.
A further 125 ml drains out when it is kept at a height of 4.25 inches, leaving 14.8 percent volume air space.
A further 375 ml drains out when the sponge is raised to a height of 8.5 inches, leaving 46.5 percent of its contents as air.
The impact of container height (or sponge height) on media air space is significant when starting with the same volume of media (or sponge). We can draw the conclusion that the selection of containers, particularly for plugs, is crucial for controlling the flow of air and water through the root zone.
I hope that was persuasive. Otherwise, have a look for yourself. All you need are some empty soft drink bottles, and I’ll teach you how to test this. Please refrain from making arbitrary changes to the experiment design parameters as this is a proper controlled experiment.