Houseplants That Need Calcium

Calcium, a plant nutrient, is a crucial regulator of development and growth. Electron-microscopical analyses have shown that Calcium, in the form of calcium pectate, is accountable for contributing to the building of cell walls in plants.

Calcium is compulsory for the founding and maintaining the lamellary systems in cell organelle. All these facts are sufficient to elucidate the indispensability of Calcium for plants’ meristematic growth.

Throughout this post, we’ll discuss those houseplants that need Calcium a little differently, with some essential basics. With frequent calcium supplementation, those plants also grow faster to gift you than your effort for their crucial calcium betterment.

What Is Calcium?

One of the most prevalent metals on Earth is Calcium, a chemical element. A specific amount of Calcium, calcium phosphate, or Ca3(PO4)2 for plant fertilizers, is necessary for plant development and general health.

One of the three secondary macronutrients is Calcium, which is also in sulfur and magnesium. These elements, which are also necessary for optimal plant growth, include nitrogen, phosphorus, and potassium, the three essential macronutrients.

Why do Houseplants Need Calcium?

Because Calcium is so immobile in plants for lower Electrical Conductivity, calcium deficiency in houseplants harms the development of new tissue, especially meristems first. Calcium insufficiency is challenging to treat and frequently affects the development of buds, flowers, fruits, and vegetables, which brown at the tip or edge.

Calcium is one element that determines the soil’s pH level, which must be in the proper range of acidity and alkalinity. Many plants appreciate somewhat acidic soil, especially those cultivated in gardens or the interior of houses.

In acidic soils, calcium shortage can be a problem. The pH of acidic soils can often only be raised in the upper horizon, up to a depth of 0 to 1 foot, which stunts root growth into deeper layers.

When To Add Calcium To Houseplants?  

If you need clarification on whether or not your plants need Calcium, it’s best to check for the following points. 

Root zone pH is too high or too low:

Conduct a soil test first. Then decide. Because depending on the soil’s pH values, which indicate how acidic or alkaline the ground is, plant nutrients might become available or unavailable.

The pH scale ranges from pH 0 to pH 14, with pH 6.5 to 7.5 often being the ideal measurement range for plant growth. Your plants need a calcium supplement if the pH is less than 6. Most Calcium loving houseplants do best with a soil or potting mix medium pH of approximately six.

Tip burning and curled leaves: 

These conditions cannot be reversed once they have occurred; instead, they wait for new growth. But swiftly decide on calcium supplements to prevent such a disaster from happening to your plant.

Pale leaves with stunted or twisted deformity: 

Withered, twisted leaves are signs of severe calcium shortage.

Blossom-edge rotting:

It’s a serious ailment caused by a lack of Calcium in the diet. Dark stains, which at first seem like weak, yellow spots, may significantly harm the fruit. Blossom end rot is a problem for tomatoes, peppers, and eggplant.

Which Houseplants Need Calcium more?

Science in detail is always complicated. Identifying calcifuges (plants that grow in acidic soil) from Calcicoles (plants that grow in base soil or calcareous soil) is a common ecological difficulty that many gardeners encounter.

The quantities of calcium ions in soil cause plants to stimulate. Calcifuges exhibit growth inhibition at high calcium concentrations and have a low Calcium optimum for growth. Calcicoles have a high growth optimum. They develop smaller or deformed tips, weaker stems that break, and become more vulnerable to snail and slug attacks when they lack Calcium.

However, in simple language, we will keep you away from this complex analysis and always give you the correct instructions. Below is an easy-to-follow checklist to help you understand which houseplants need Calcium more than others.

40+ Houseplants That Need Calcium more

Although all houseplants require Calcium in some amount at some point in their life cycle, we have compiled a short list of calcium and houseplants knowledge for you here. This short list of calcium-hungry plants includes mainly those houseplants that require high calcium metabolism.

  1. Tomato
  2. Swiss Chard
  3. Succulents
  4. Spinach
  5. Spider Plant
  6. Re-potted Young Plants
  7. Pomegranate
  8. Pepper
  9. Peperomia
  10. Pears
  11. Orchids
  12. Mustard Greens
  13. Marigolds
  14. Lemons
  15. Kalanchoe
  16. Ivy
  17. Hoya
  18. Hot Peppers
  19. Eggplant
  20. Dwarf Lemon Trees
  21. Dicotyledonous
  22. Cucumber
  23. Croton
  24. Coleus
  25. Cocks Comb
  26. Chrysanthemums
  27. Chrysanthemum
  28. Cherry
  29. Cauliflower
  30. Cast Iron Plants 
  31. Capsicum 
  32. Caladiums
  33. Cacti
  34. Cabbage
  35. Bromeliads
  36. Broccoli
  37. Berry
  38. Begonias
  39. Beans
  40. Apricots
  41. Apples
  42. African Violets

How To Add Calcium To Houseplants? 

For calcium fertilizers, there are many calcium sources available. The pH level of your garden soil, the timing, and the name of the crop all play a role in which one is best for you, how much to use, and when.

Foliar Spray:

Since plants absorb nutrients more effectively through their leaves than their roots, commercial foliar calcium sprays provide the quickest treatment for acute calcium insufficiency.

It’s frequently used to treat problems with container plants, particularly for seedlings and transplants. Foliar sprays should be considered a supplement to adequate soil nutrition management because they do not modify the soil. 

Form: Calcium acetate, calcium nitrate, calcium chloride


The most significant calcium enhancer you can feed your soil is lime, which also improves the pH of your soil, making it less acidic.

Form: Calcium hydroxide

Dolomite Lime:

Dolomitic lime comprises magnesium carbonate, which raises pH on low-magnesium soils while adding a significant quantity of Calcium to your soil. If a soil test reveals that magnesium levels are already high, pick a different calcium supplement.

Form: Calcium carbonate


This is a low CEC, fast-acting calcium supplementation that neither lower nor raises pH.

Form: Calcium sulfate

Ground Oyster or Clam Shell Flour:

It’s a vital source of Calcium, but because of the low solubility of the shells, it takes a long time for them to raise the soil’s pH.

Form: Calcium carbonate

Wood Ashes:

Hardwood ashes enhance the pH of your soil while also adding a significant quantity of Calcium (unlike softwood ashes, which are NOT RECOMMENDED). Keep in mind that lime is only half as effective as hardwood ashes.

Form: Calcium carbonate

Soft Rock or Colloidal Phosphate: 

Rock phosphate is much less soluble and distributes Calcium into the soil more slowly than lime. The pH is slightly raised by it.

Form: Calcium oxide

Bone Meal: 

This high-phosphate fertilizer releases nutrients more slowly and is less soluble than lime. When you wish to boost the pH of the soil moderately, use it. Bulb and root crops benefit particularly from bone meal.

Form: Calcium phosphate 

Egg Shells: 

If sales statistics are to be believed, everyone has been eating many eggs lately. You adore what lies within them. However, did you know that your plants love the outdoors? Yes. There are surprisingly many ways to improve your plants using eggshells.

Form: Calcium phosphate

How to Make Liquid Calcium for Plants?

Whisk the calcium powder until it’s thoroughly dissolved after adding it to the water. This approach is excellent since it ensures that the Calcium will reach the plant’s roots, where it’s most required. Use all of the liquid within 24 hours; after that, it will begin to deteriorate.

Best Calcium Supplement For House Plants

Among the many distorted calcium supplements in the market, we have selected two unique options below.

Calcium Nitrate Fertilizer 15.5-0-0 or Ammonia Calcium Nitrate 15.5-0-0):

Treat it as you would do with any fertilizer. It should be a 15.5-0-0-19Ca formula, so if you need 100 ppm N for weekly feeding, you divide 9.2 by the %N = 0.594 ml/L (or 8/15.5=0.516 tsp/gal or just use 1/2). The solution will have 18/15.5 = 126 ppm Ca.

You may mix it with your regular fertilizer to provide a more-or-less “continuous” supply of Calcium. If you mix it 50/50 with a 10-12-8 formula, the 50/50 blend would be 12.75-6-4-9.5Ca. If you want to feed that weekly at the strength of 100 ppm N, it would be 9.2/12.75=0.72 ml/L or 8/12.75=0.63 tsp/gal. 

Or, if you want to use the formulation without Chlorides, Nitrates and Sulfates, go for the below option.

Calcium FoliaStim® SC for houseplant: 

It comprises seaweed and calcium carbonate. It considerably advances plant firmness and fighting stamina to abiotic stress throughout critical stages. Before using it, could you give it a good shake? It’s very soft for leaf tissues and buds especially.

Calcium for Houseplants: Pros & Cons

For the following reasons, Calcium is a vital nutrient for all plants. The benefits and drawbacks of Calcium for indoor plants are listed below.

Calcium Pros for houseplants:

Calcium is necessary for cell elongation in shoots and roots for a cell to function for growth and development. Plants use Calcium to lengthen cell walls, enabling the plant to expand and begin the production of new cells and tissues. It also sends signals to coordinate specific cellular functions and activates many enzymes.

Neutralizer for soil:

Calcium is frequently used as a soil modification to change the pH of the soil. Calcium is provided to the ground to lessen the harm caused by fertilizer misuse.


Calcium not only improves the plant’s health but also increases the nutritional value of the plant, whether it’s ingested by livestock, people, or animals in a healthy wild habitat.

Pest Protection: 

Your houseplants will become frail and vulnerable to pests and illness if their calcium levels are insufficient.

Root strengthening: 

Calcium is vital for the development of enzymes that are essential for plant cellular function. This is crucial for the growth of root systems since they take up different nutrients.

Calcium Cons for houseplants:

Use sparingly though Calcium toxicity rarely occurs. High calcium levels can inhibit potassium and magnesium intake, leading to deficits in those minerals.


Can I Put Eggshells In Compost?

You can purchase calcium supplements, but breaking up shells and adding them to the soil as an amendment is a more environmentally friendly and economical option. Eggshells that are clear and dry can go straight into your compost. 

Why Are Eggshells Good For Plants?

Additionally beneficial to garden soil, eggshell calcium balances soil acidity while supplying nutrients to plants. Although you would need a lot of eggshells to have a noticeable effect, eggshells have a lot of Calcium and can be utilized almost like lime. Mainly, the Calcium in eggshells will effectively deter blossom-end rot. 

Which Houseplants Are Eggshells Good For?

Fertilizer made of eggshells is particularly beneficial for plants like tomatoes, peppers, and eggplants. Additionally, calcium-rich foods, including cauliflower, broccoli, cabbage, spinach, swiss chard, and amaranth, will benefit from eggshells.

How To Use Eggshells For Plants? 

If the soil has the proper pH and your indoor plants need Calcium, smash eggshells and apply them to the ground. Egg shells can be set on fire, collected as ash, spread over the soil, or stirred into water.

Also Read: Building Regulations, Planning Permission and Wildlife Habitats 101 Review


Today no one questions the fact that the unnumbered processes in which Ca2+ ion participates are enormous and link nearly all aspects of plant development. Calcium is undoubtedly a Central Intracellular Regulator of Plant Growth and Development.

So for the overall good of your houseplants, there is no point in ignoring their calcium metabolism. Don’t delay to Supercharge your plants with the best of your Calcium enrichment tactic and recipe.

I hope this article will help you examine houseplants with higher calcium demands having polypeptides in their body with an extreme affinity for Calcium.

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