Lower pH soil is referred to as acidic soil. The majority of houseplants like soil that is neutral in pH, or between 6.5 and 7.0. The pH of acidic soil is lower than 6.5. Alkaline soil, on the other hand, has a pH of greater than 7.5.
Which houseplants prefer acidic soil?
Before we go any further, a word of caution: African violets are actually quite difficult plants. They even appear on our list of the most difficult houseplants to grow.
The correct selection of soil and overall soil pH is one of the most difficult elements of caring for African violets.
African violets like soil that is at least slightly acidic, even though they don’t like it to be extremely acidic.
Try to maintain a soil pH between 6.0 and 6.8 if you want your African violets to thrive.
Blueberry plants
While blueberry bushes can be grown indoors, blueberry plants aren’t typically planted as houseplants.
Even if it can be difficult, growing blueberry plants at home is possible if they are planted in the correct soil and receive enough direct sunlight (approximately 6 hours per day is required).
Your blueberry plant won’t thrive in a typical houseplant potting mix because the soil pH in these mixtures is far too high for blueberries.
You may always use an acidic fertilizer to slightly lower the pH of your soil if it ends up being too high.
Sphagnum peat moss or even some pine bark added to the soil is a fantastic additional method for lowering the pH of the soil.
Gardenias
Another common houseplant that enjoys acidic soil conditions is the gardenia. Gardenias also benefit from good drainage.
Gardenias are excellent bathroom plants due to their aromatic blossoms and innate demand for dampness. You would need to make sure they get adequate light if housed in the bathroom, though.
A sunny window in the bathroom with a few hours of direct sunshine should do the trick.
5.0 to 6.5 is the ideal range for soil PH for the greatest results (acidic to slightly acidic).
Ferns
There are a lot of different ferns, and many of them are grown as houseplants, including the Boston fern, Maidenhair fern, and Kangaroo Paw fern, to mention a few.
Although the majority of ferns can endure a wide range of soil pH levels, they all prefer acidic soil (one exception to this rule is the Maidenhair fern which grows best in neutral to alkaline soil, with an ideal soil pH between 7 and 8).
While some ferns thrive in acidic soils, others reach their full potential on soil that is just slightly acidic.
Therefore, let’s examine a few ferns and estimate the appropriate soil pH for each of them.
A purchased houseplant potting soil mix’s pH is likely to be too high for your fern if you use it, so keep that in mind as well.
When putting together the soil for your fern, it is typically a good idea to blend your potting soil mix and finely ground peat moss 50/50 in order to lower that pH value.
Boston fern
Nephrolepsis exaltata, also known as the Boston fern, is a fairly common houseplant. The world’s tropical regions are home to this evergreen perennial, which is prized by lovers of indoor plants everywhere.
Ferns aren’t exactly the finest houseplants for beginners, it must be stated, though. The majority of ferns, like the Boston fern, are quite picky and could perish without the proper care.
Our list of the hardest houseplants to grow includes the Boston fern since it is said to be exceptionally difficult to grow.
Which plants thrive in an acidic environment?
Acidic soil is also preferred by many deciduous and evergreen trees, including beech, willow, oak, dogwood, mountain ash, and magnolias.
Azaleas, mountain heather, rhododendrons, hydrangeas, camellias, daffodils, blueberries, and nasturtiums are a few popular acid-loving plants.
These hardy plants fill the yard with lush greens and a magnificent display of spring and summer color when grown in acidic soil. Blooms that are strong and sturdy will result from pH-balanced soil. Lack of acidic, nutrient-rich soil will result in feeble, faded blossoms and yellowing leaves.
How can you tell whether a plant prefers acidic soil?
Without the hydrangea, no list of plants that thrive in acidic soil would be complete. When the soil is acidic, the plant is covered in bright blue flower heads.
The hydrangea is a useful indication of the pH in your garden soil since its blooms blossom pink without any obvious discoloration in the leaves, unlike most acid-loving plants that turn chlorotic (yellow-green leaves) without a low enough pH.
Which pH do indoor plants prefer?
Because the required nutrients are most accessible at that pH range, many plants flourish there. But for optimal growth, some plants need a higher or lower pH level. If the plant’s preferences fall outside of this range, it is typically noted on seed packs and plant identification tags. The appropriate range of soil pH for a given plant is frequently provided in gardening manuals and publications, and it is typically noted whether a plant needs an acidic or alkaline soil.
What types of plants dislike acidic soil?
Caryopteris x clandonensis, sometimes known as bluebeard, is a woody perennial with aromatic, gray-green leaves. It produces clusters of bluish-purple flowers from late summer until the next fall. This appealing shrub can thrive in neutral, mildly acidic, or mildly alkaline soils. If your garden area is highly alkaline, you can “sweeten” it by introducing organic matter, garden sulfur, sphagnum peat, or acidic pine needles as mulch in order to lower the alkalinity.
How acidic is Miracle Grow potting soil?
Its pH range of 6.3 to 6.8 guarantees that your plants receive the ideal level of acidity while not reducing the availability of crucial plant nutrients.
The availability of some elements, such manganese and aluminum, can be increased to dangerous levels by excessive acidity.
Aluminum enters root tip cells and prevents cell elongation and division. The plant eventually dies as a result of the root’s stunted and reduced nutrition and water intake.
Are succulents amenable to acidic soil?
Succulents and cacti are drought-tolerant, low-maintenance plants. The fleshy tissues of their stems, roots, or leaves, which come in a variety of hues and patterns, are where they retain water. With these professional tips, you may learn to grow succulents and cacti yourself or give them as gifts:
- Succulents and cacti do well in containers. They don’t require frequent repotting because they grow slowly.
- If your plants are not a cold-hardy kind, bring them indoors during the winter.
- To allow moisture to evaporate, containers must include drainage holes.
- For proper drainage, always use cactus soil or mix sand into your potting soil.
- Succulents generally prefer somewhat acidic soil (5.5-6.5).
- Overwatering is the most typical killer of cactus and succulents.
- To determine how damp or dry the soil is, a moisture meter is a useful instrument. When in doubt, avoid watering!
- When they are actively growing in the spring and summer, succulents require more water.
- Depending on the temperature, water once or twice a week. Reduce watering to every two weeks when the temperature rises to 90 degrees or higher.
- When the temperature is too hot, plants go dormant so they can survive on the water they have stored.
- Reduce watering to once every 3–4 weeks in the late fall and winter.
- In the spring, summer, and early fall while they are actively growing, plants are hungry.
- Use fertilizers designed for cacti and succulents.
- Your plants need nitrogen fertilizer if they are starting to look a little stunted.
Growing a jade plant is quite simple. Between waterings, allow the soil to totally dry out. prune to maintain symmetry.
Aloe Vera: For generations, burns have been treated with the soothing fluid of this succulent plant. Avoid letting the plant sit in water and let the soil dry out between waterings.
Ponytail Palm: This plant belongs to the succulent family and is not at all a palm tree. This plant is ideal for careless gardeners because of how much water it can store in its bulbous stem.
The ideal choice for an experienced gardener is a Christmas cactus. Buds can fall out from even the smallest amount of under or overwatering. Place to promote the production of buds and flowers in a chilly environment (about 55 degrees).
Hens & Chicks: These two plants also go by the names echeveria and sempervirum, respectively. Allow plants to gradually dry out in between waterings.
Crown of Thorns: To preserve the leaves and blooms during flowering, simply allow the top inch of soil to become dry.
A very resilient succulent plant that can withstand a lot of abuse is the snake plant. Once a year, fertilize, and let the plant dry out in between waterings.
Why does acidic soil appeal to plants?
Be cautious when blaming other diseases or horrifying-sounding conditions like “verticillium” and “fusarium” for the sickly browning of your pin oak or geranium’s foliage. Your soil’s pH may be the source of the issue. Every plant has a preferred range of soil acidity, and when the pH level is outside of that range, a number of negative consequences may occur. A fundamental understanding of pH will aid you in case something goes wrong as well as maintain the health of your garden. Here is the information you need to know to manage the pH of your soil.
First, what is pH?
A substance’s acidity or alkalinity is expressed on a pH scale, which ranges from 0 to 14. Seven is the neutral pH. The acidity increases as the number decreases after 7. Alkalinity rises starting at number 7, as do the numerals. The pH of soils typically ranges from 3—extremely acidic—to 10—very alkaline. The parent material of the soil and the quantity of annual rainfall a location receives are just two of the many variables that contribute to this spectrum. The majority of cultivated plants like a pH of about 6.5, which is somewhat acidic. The plants that require a very acidic pH of 4.5 to 5.5 include pin oak, gardenia, blueberries, azalea, and rhododendron.
2. What is pH used for? Plants are impacted by soil pH in indirect but significant ways. Depending on the pH of the soil, plant nutrients may become available or unavailable (chart, right). Young leaves that have yellowing between their veins are iron deficient, a condition caused less by a shortage of iron in the soil than by a lack of soil acidity, which transforms iron into a form that plants can absorb. Because of the good availability to all nutrients that a slightly acidic soil pH provides, the majority of plants grow there.
Plant poisoning is the most sinister aspect of soil pH. Geraniums are particularly sensitive to this, displaying their displeasure with yellowed, brown-flecked, or dead leaves. A pH level that is too low might make the plant nutrient manganese available at lethal quantities. Aluminum, which is not a nutrient for plants, is also released when the pH level is too low. Aluminum can impede root growth and obstruct nutrient uptake in plants. The plant nutrient molybdenum becomes toxically accessible at high pH levels.
The health of soil-dwelling creatures, in turn, impacts the state of the soil and the health of plants. Soil pH also affects these species. Earthworms and bacteria that transform nitrogen into forms that plants may use both appreciate the slightly acidic environments that most plants do.
3. How are pH adjustments made?
You must be aware of the pH level of your soil at the moment before attempting to alter it. This will determine whether or not you need to boost it or lower it. A straightforward soil test can be carried out by a soil-testing facility or at home. The texture of your soil, whether it be clay, sand, or something in between, must also be understood. The charged surfaces of clays make them more resistant to pH changes than the uncharged surfaces of sand particles, hence more material is required to alter the pH of a clay soil than a sandy soil.
In general, sulfur is utilized to lower pH levels and limestone to raise them. Dolomitic limestone is a mixture of calcium carbonate and magnesium, unlike limestone, which is a relatively pure form of calcium carbonate. Dolomitic limestone adds magnesium to the soil and, pound for pound, neutralizes more acidity than pure limestone, making it ideal for gardeners in the East or the Pacific Northwest where these nutrients are deficient.
Sulfur and limestone are both available in powdered and pelletized forms, the latter of which is easier to spread evenly and has less health risks due to dust. Sulfur powder sold as a fungicide should not be used since it is finer and more expensive than is necessary to acidify soil. When immediate action is required, fully incorporate limestone and sulfur into the top 6 inches of soil. These substances are not soluble in water. If not, simply spread the material across the ground and let it to sink gradually.
4. Why should your pH be checked? Don’t forget to keep in mind the pH level once it has been adjusted for the plants you are growing. In the naturally acidic soils of the East and Northwest, where rainfall leaches off calcium and other alkaline-forming components, maintaining the proper pH level for your soil is a continuous chore. Due to the rock minerals that made up the soils that naturally have an alkaline pH, these soils will continue to go up the pH scale. In some circumstances, it is impossible to acidify these soils. Even fertilizers have the potential to change the pH of your soil over time. Ammonium sulfate and ammonium nitrate will tend to lower the pH level while potassium nitrate or calcium will tend to raise it. Consequently, sulfur or limestone additions must be made on a regular basis.
Are pothos tolerant of acidic soil?
Pothos is a good plant to cultivate in hanging baskets because its long, luscious vines can climb over windows and trellises or trail downward. The more colorful variegated pothos want a little more light, perhaps next to a window with a sheer curtain to filter the light. The plant grows well in low to medium light. Pothos plants absorb carbon dioxide and release oxygen, just like other houseplants, making them a desirable addition to a household for both their plant health advantages and ornamental appeal.
Types of Soil for Pothos
Pothos-friendly growth mixtures include elements that make it simple for the plant’s roots to access oxygen. Pothos can be grown in many common houseplant soil mixtures, but stay away from planting it in soil meant for succulents and cacti. The moisture that pothos needs is not retained by succulent soils because they drain too quickly. Additionally, stay away from growing pothos in garden soil, which is too compact and can contain insects like gnats that might travel to other indoor plants and infest the house.
Even though the majority of indoor grow mixes aren’t designated explicitly for pothos on the label, acceptable mixtures typically include one or more of the following components.
- Bark: Usually from fir or pine trees, bark helps the mixture drain well and keeps it light.
- Coconut coir is an absorbent material that absorbs water. It is made from the coconut husk, which is found between the coconut’s fruit and its tough outer shell. Pothos benefits from the progressive discharge of that water.
- Perlite is a light, airy byproduct of volcanic glass that is produced naturally. It aids in preventing compacting of the potting mix and also holds some moisture.
- Peat moss is a lightweight, extremely absorbent material that is harvested from moss bogs. This component is frequently the main base in indoor potting mixes, along with coco coir.
- Sand for gardens: Sand promotes drainage and gives the soil a little more structure, which helps anchor the roots of huge pothos.
- Hand-mixed: As an example, use a mixture that is roughly equal parts peat moss, perlite, sand, and shredded bark.
Drainage
When caring for pothos, it’s important to place it in a pot with good drainage as well as in a soil type that drains well. Choose a pot with holes on the bottom so that water can drain. The plant can be put in a sink or tub where the water can easily flow through if it is tiny enough.
If sink watering is not possible, think about using a pot with a saucer that rests below the level of the drainage holes to prevent the roots of the pothos from getting wet. Before adding the grow mix and the pothos plant, add 1 to 2 inches of gravel or tiny rocks to the bottom of the pot to improve drainage.
Moisture Retention and Aeration
Planting pothos in soil that keeps moisture while still draining properly may seem counterintuitive. Nevertheless, it offers the plant’s roots with a perfect environment that resembles their habitat in Southeastern Asia.
Peat moss and coco coir, along with well-draining elements like sand or perlite, help water to percolate through the mixture while holding back a tiny quantity so that the plant’s roots don’t dry out between waterings.
Bark and other bigger soil components keep the mixture light and generate air pockets, allowing the roots to access oxygen.
Nutrients
Although some indoor potting mixes include plant food, extra feedings are usually required from one to six months after repotting, depending on the variety. During their active growing season, pothos typically perform best when fertilized every 4 to 6 weeks (spring and summer). During the late fall and winter, fertilizing can be decreased by half.
Pothos loves soil that is somewhat acidic and has a pH between 6.1 and 6.8. Thankfully, the majority of indoor grow mixtures also fit into that range. Yellowing leaves on an unhappy plant could be a sign that the soil is too alkaline. Online and in gardening supply stores, inexpensive pH testers are readily accessible. If necessary, top dressing—adding peat moss to the soil’s surface—can aid in lowering alkalinity.