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Best Arrowhead Plant Soil And Fertilizer [A Complete Guide]

Applying the fertilizer timely might not always boost the Arrowhead plant growth as the permeability and porosity of the soil determine the absorption rate.

Generally, the Arrowhead plant thrives in a chunky, organic potting mix prepared from soil, orchid bark, and perlite that stays slightly acidic (5.5-6.5) and moist without being too soggy, allowing the optimum retention and absorption of fertilizer applied monthly.

However, the soil turns compact and holds water more than necessary over time.

So, continue the article to learn about the soil mixture and fertilizer best for the Arrowhead plant.

What Kind of Soil Does Arrowhead Plant Prefer?

As a native of the tropical rainforests of South America, the Arrowhead plant tends to grow in well-draining soil rich with decomposed matter.

So while growing indoors, light soil like the cactus mix is good for the Arrowhead plant. Also, the pH should be around 5.5-6.5 and richly filled with organic matter.

However, the soil of the Arrowhead plant should be tight enough, allowing it to hold the required moisture and fertilizer.

Further qualities demanded by the Arrowhead plant and its varieties are elaborated below.

Soil TypeLoose, porous, and well-draining soil
Soil MaterialRegular potting soil with organic materials such as peat moss, perlite, pumice, composted bark, pine bark, rice hulls, etc.
Soil pH LevelSlightly Acidic (5.5-6.5)
Soil CompactionSlight or None
Soil Drainage1-2 inches per hour
TextureLoamy, dark, and less compact
Water Retention CapabilityOver 40%
Soil Temperature60°F to 85°F in spring and summer
Nothing less than 55°F in fall and winter
Supplementary NutrientsThe proportional amount of nitrogen, phosphorus, and potassium with micronutrients like iron, nickel, calcium, sulfur, and Copper-Boron.
Soil ToxicityInduced by pesticide and fertilizer salts like aluminum, lead, and chromated copper arsenate
Soil ChangeEvery 12-24 months

Factors to Consider for Appropriate Arrowhead Soil

Being an aroid and creeping epiphyte, the Arrowhead plant requires enough air pockets to hold water and nutrients and perform aeration.

So to provide the optimal substrate, look out for the given factors to consider while choosing the soil.

1. Soil Moisture

Like any tropical houseplant, Arrowhead suffers from excess soil moisture leading to roots drowning. This leads to root rot, a common problem in the plant.

On the other hand, dried soil obstructs the nutrient and water intake of the plant. It indirectly causes the drying and crisping of the leaves.

Therefore, the soil should be well-draining, absorbing adequate moisture while throwing out the excess water and helping supply maximum nutrients to the entire plant.

You can attain so by watering the Arrowhead plant varieties once every one to two weeks, depending upon the season of the year.

Moreover, a regular watering schedule will prevent the soil from compacting.

2. Drainage Capacity of Soil

Arrowhead plants are drought tolerant, so keeping them in highly moist soil can lead to rotting and fungus growth.

So for the healthy growth of the plant, choose well-draining soil with a capacity of percolating 1-2 inches of moisture per hour.

However, it will depend on whether the plant is grown indoors or outdoors and the size and material of the pot.

Usually, terracotta pot allows better drainage by holding enough moisture in the soil.

You can also go for a plastic pot with enough drainage holes (at least 2) filled with free-draining soil to avoid decreased aeration and fast soil compaction.

3. Nutrients and Organic Matters

Although Arrowheads are not heavy feeders, they require monthly balanced fertilization to fulfill their essential nutrient needs.

In case of deficiency, the leaves will signal it by turning yellow from the edges and drying down to fall over entirely.

So better to keep a fertilization schedule but try not to feed over as it can cause salt buildup in the soil, responsible for root burning.

A person is holding a brown pot with Arrowhead plant
Apply a mulch of straw or wooden chips over the soil to boost aeration and act as an organic matter.

You can use organic matter like compost, banana peels, and eggshells to provide slow-releasing nutrients while aiding with perlite and coco fiber to boost drainage.

4. Soil Compact and Aeration

Indeed, houseplant soil should be slightly compact before being watered again, but it does not mean you should let it dry out completely.

Soil compactness and aeration quality of the soil will determine whether your Arrowhead plant will thrive or fail to bloom.

You should choose potting materials that boost aeration, including perlite, pumice, pine bark, and charcoal, to help the roots obtain more oxygen and nutrients.

According to BMC, soil aeration also negates the negative effect of Sodium Chloride (Salt).

Good soil aeration enhances root development, while slight soil compaction will support root growth.

Therefore, waiting for the top 2 inches of soil or 75% of topsoil to dry out between watering will support the growth.

5. Balanced Soil Temperature

Generally, the soil temperature should stay between 65 to 85°F at all times to support the photosynthesis process.

As for your Arrowhead plant, it will thrive in a soil temperature of around 70°F (21°C) during the day.

However, ensure the temperature does not dwindle and goes below 55°F at night as they are not frost tolerant and can wither.

So when the weather gets cooler, usually in late fall and winter, you should move your plant to a warm location.

Also, insulate the soil with mulch or add a heating mat to compensate for lost soil temperature.

6. Correct Soil pH

Arrowhead plants thrive in slightly acidic soil (5.5 to 6.5 pH), which helps break down nutrients for the plant roots and boost nutrient uptake.

On the other hand, the alkaline soil releases excess sodium that slows down plant growth. Therefore, an ideal potting mix with less pH is necessary.

Introduce crushed sulfur and ammonium-based nitrogen into the soil to decrease the pH level naturally.

However, keep the toxicity of low pH in mind, including Aluminum and manganese toxicity and lack of calcium, which will drastically hinder the development of roots, stems, and foliage.

Prepping the Soil/Potting Mix for Arrowhead

Arrowhead plant requires a typical aroid mix that contains an equal part of regular potting mix, perlite, and orchid bark.

Choosing and preparing the right soil mix allows well-drainage and aeration with balanced moisture and enough air pockets for aeration.

Here are some favorite homemade recipes for preparing the ideal Arrowhead potting mix.

First Recipe

Second Recipe

Third Recipe

  • 35-45% peat moss
  • Equal amount of humus and perlite
  • A handful of horticultural charcoal

Consider using the above-given recipe to prepare the ideal potting mix, as a lack of these materials will likely cause slowed growth.

Best Soil Mix for Arrowhead Plant: For Sale

Alternatively, you can purchase commercial potting mixes for your Arrowheads. But the varieties of combinations online, claiming to be the best, can be confusing.

Here are a few commercial potting mix options for your Arrowhead plant that you can use as a go-to option.

Potting MixBenefits
Noot Organic Potting Mix
1. All-purpose mix for aroid plants
2. Contains 10-15-12 NPK
3. Safe for pets and children
Miracle-Gro Potting Mix
1. It contains processed peat, coir, and compost
2. Provides the fast-draining ability
3. Applicable for all flowering plants
Espoma Organic Soil Mix
1. A rich blend of sphagnum peat moss, humus, and perlite
2. Supplemented with earthworm casting, alfalfa, and kelp meal
All Natural Orchid Mix1. An all-purpose blend containing charcoal, sponge rock, pine bark, and coconut chips
2. Promotes good aeration and drainage
Burpee Organic Mix1. Formulated with coconut coir
2. Ensure vibrant blossom
3. OMRI listed for organic use

Signs of Wrong Potting Mix for Arrowhead Plant

Meeting the soil requirement is what we all wish while planting Arrowheads. However, nothing remains perfect all the time.

Poor soil conditions may arise due to insufficient fertilizer or the wrong choice of materials.

These conditions give rise to visible signs indicating your plant might be suffering.

Soil Compaction1. Overfertilization and drought will lead to soil compaction.
2. The soil microorganisms will die, leading to a sterile potting medium.
3. Root, stem, and leaves dry due to transpiration and turn brownish.
Low Water Infiltration1. Compact soil has fewer pores to pass water, leading to low infiltration.
2. It leads to water restriction (less than 0.06 inches per hour).
3. It is indicated by browning leaf tips and edges.
Waterlogged1. Water saturation will drown the roots.
2. It will lead to root rot and stem decay.
3. Yellowing and browning of leaves.
4. Slow growth, mushy stems, and deformed leaves.
Soil Contamination1. Fungal infestation, fertilizer salts, and pesticides will lead to soil contamination.
2. Discolored soil and unusual odor.
3. Stunted growth, followed by slow death.
Bad Odor in Soil1. It indicates inadequate drainage or a lack of oxygen.
2. Waterlogged, low water infiltration, and sterile soil condition.
3. It will invite root rot.
Mold and Pests Infestation1. Excess humidity and wet conditions will invite mold and pests.
2. Leaf discoloration, yellowing, brown patches, and holes.
3. Mushy stems and roots.
Yellowing or Drooping Leaves1. It indicates inadequate aeration due to waterlogged or compact soil.
2. The foliage will begin to droop and turn yellow.
3. The yellowing will gradually invite leaf browning and decay.

Does Arrowhead Plant Need Fertilizer With The Soil Mix?

Similar to how people need food in their homes, the Arrowhead plant also needs fertilizer even if the soil is organically rich.

This is because the soil lacks the essential micro and macronutrients required for the healthy growth of Arrowheads.

Thus, you need to fertilize the Arrowhead plant once or twice a month with a balanced fertilizer. All-purpose slow-releaser is the best fertilizer for Arrowhead plants.
Arrowhead plant in white pot
Arrowhead plant receiving enough feed shines the best spade-shaped leaves.

However, do not forget to dilute the solution to half strength for monthly feeding and 1/4th for fortnightly feeding.

Dilution helps decrease compaction and yellowing and browning of leaves due to over-fertilization.

Best Arrowhead Plant Fertilizer

Choose the best commercial fertilizer available in the market not to degrade the soil quality over time due to salt buildup.

In such cases, you can opt for organic fertilizer to maintain the soil quality over a long period.

Here is the list of organic liquid fertilizers appropriate for the Arrowhead plant.

Miracle-Gro All Purpose1. All-purpose with a balanced NPK ratio.
2. Entirely safe for the plant.
3. Water-soluble property prevents root burn and works instantly
Jack All Purpose Fertilizer1. All-purpose with a 20-20-20 NPK ratio.
2. It contains NPK with boron and copper.
3. It provides rapid leaf expansion and green color.
Espoma Company Organic Food1. Best indoor plant food with a 2-2-2 NPK ratio.
2. Completely safe to use around kids and pets.
3. It prevents the risk of root burn
Osmocote Smart-Release Food1. Slow release food with 15-9-12 NPK ratio.
2. Can be used for both ground and container plant.

Alternatively, you can choose slow-release fertilizer once every three months to prevent the risk of over-fertilizing the plant.

How to Apply the Fertilizer in Arrowhead Plant?

Arrowhead plants like fertilizer. But it should be scheduled and not over-fed as they easily get the problem of over-fertilization.

Follow the steps to apply the fertilizer without hurting the roots and leaves of Syngoniums.

  • Mix the liquid concentrate in a jar or can of water at a 1:1 ratio.
  • Sprinkle over the soil at some distance away from the plant root.
  • Water the plant to help the nutrients spread across the pot.
  • In the case of slow-release fertilizer, spread the pellets around the plant and water thoroughly afterward.

Take the video for reference!

From Editorial Team

Extra Tips!

A healthy potting medium ensures the healthy growth of the plant, ensuring lush, green spearheaded leaves.

All you need to do is follow the regular care guide, use the correct potting mix, and change the soil every 1-2 years.

Follow this guide to check your Arrowhead plant soil and fertilizer requirements!

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