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What Is Calcium Carbonate Powder? (کیلشیم کاربونیٹ پاؤڈر کیا ہے؟)
Meaning of Calcium Carbonate Powder in Urdu is “کیلشیم کاربونیٹ پاؤڈر” چونا پتھر اور چاک میں پایا جانے والا معدنی مرکب، جو تیزابی مٹی کی تیزابیت کم کرنے اور پودوں کو کیلشیم دینے کے کام آتا ہے. If you want to correct soil acidity and need to know exactly what goes into your pots or beds, this is the plain, single-ingredient way to do it.
It is a dry mineral powder. The same compound makes up chalk, limestone and eggshells, which is why it is the active ingredient in agricultural lime. What changes from one product to the next is the grade, meaning how pure and how fine it is, so check the specification table below.
At a Glance
| Question | Answer |
|---|---|
| What is it? | CaCO₃, a mineral powder. A soil conditioner, not a fertiliser. |
| Product type | Soil conditioner and calcium source |
| Grade | 99.9 |
| What does it do? | Helps raise the pH of acidic soil and supplies calcium. |
| How much? | Starting points: about 100 g per m² in beds, 1–2 g per litre in potting mix. |
| How fast? | Slowly – typically weeks to a few months. |
| What is it not for? | Not a fertiliser, liquid feed, foliar spray, pest control or anything to eat. Not for alkaline soil or acid-loving plants. |
Which Problem Are You Trying to Solve? (آپ کا مسئلہ کیا ہے؟)
Most wasted money in soil correction comes from using the right product on the wrong problem. Use this quick check before you order.
| Your situation | Is this powder the answer? |
|---|---|
| A soil test shows acidic soil | Yes – this is what it is for. |
| Plants are pale and slow, but you have not tested pH | Test first. Acidity is only one possible cause. |
| Dark, sunken patches at the base of tomatoes or peppers | Maybe. It helps only if soil is acidic or low in calcium; uneven watering is another common cause. |
| Soil tests neutral or alkaline | No. It would push pH higher. |
| Pests, fungus or leaf spots | No. It is not a pesticide or fungicide. |
| Feeding a hydroponic tank or spraying leaves | No. It dissolves too little in water for that. |
Many garden soils across Pakistan’s plains lean neutral to alkaline, so acidity is not the default problem here. It shows up more in wetter hill areas, in peat-heavy pots and in beds fed with nitrogen fertiliser year after year. Heavy monsoon rain can also wash calcium out of light, sandy soil over time.
A pocket pH meter or test strips give a quick first reading, and an agriculture university or provincial soil lab can run a full test.
Looking for calcium carbonate near me? Order online from Organic Baghbani and see related products in our Soil pH Adjusters & Conditioners category.
What Can It Do for Your Plants? (پودوں کو کیا فائدہ ہو سکتا ہے؟)
- Can raise soil pH in acidic soil, which tends to free up nitrogen, phosphorus and potassium for roots.
- Supplies calcium (کیلشیم), which plants use to build cell walls.
- Gives you a measurable, repeatable dose for pots and homemade potting-mix batches.
- Works alongside compost and most fertilisers, because it conditions the soil rather than feeding it.
- May support tomatoes and peppers where low calcium or acidity is part of the problem.
- Can buffer a sour worm bin when used in small amounts.
What it will not do
- It will not feed plants. Pair it with compost or fertiliser.
- It will not act as a pesticide, fungicide or disinfectant.
- It will not help alkaline soil.
- It will not work as a quick liquid fix, because it barely dissolves in water.
Results depend on your soil, your plants and your watering.
Where and How Much Should You Use? (کہاں اور کتنا ڈالیں؟)
These are conservative starting points for mildly acidic soil. Very acidic soil needs a test-based dose, split into two rounds several weeks apart. A level teaspoon of fine powder is roughly 4–5 g, but a kitchen scale is better.
| Situation | Starting amount | Notes |
|---|---|---|
| Small pot (about 2 L of mix) | 2–4 g, roughly ½ to 1 level teaspoon | Only for peat-heavy mixes or a low pH reading. Mix through before planting. |
| Large pot or grow bag (about 10 L) | 10–20 g | Same rule: test or peat-heavy mix only. |
| Homemade potting-mix batch | 1–2 g per litre of mix | Blend dry into the mix before wetting. |
| Vegetable or raised bed | About 100 g per m² | Mix into the top 10–15 cm, 2–3 weeks before planting. |
| Lawn (لان) | About 50–100 g per m² | Scatter evenly, brush in, water. |
| Fruit trees (پھلدار درخت) | About 100 g per m² under the canopy | Fork in lightly; keep it off the trunk. |
| Worm bin | A light dusting, about a teaspoon over a medium bin | Only if the bin smells sour or tests acidic. For starting one, see red wiggler worms. |
| Seeds and seedlings | None directly | Correct the pH in the bed beforehand. |
Recheck pH after 6–8 weeks and add more only if it is still low.
How Does It Compare with Other Soil Inputs? (دوسری چیزوں سے فرق)
| Input | Main job | Raises pH? | Choose it when |
|---|---|---|---|
| Calcium carbonate (this product) | Neutralises acidity, supplies calcium | Yes | A test shows acidic soil and you want a measured dose. |
| Crushed eggshell (DIY) | Slow calcium source | Slightly, and very slowly | You have a few pots and plenty of time. Particle size varies, so results vary. |
| Vermicompost | Nutrition and soil life | Not a pH corrector | The soil needs feeding more than correcting. |
| Rice husk ash | Potassium and silica source | Mildly alkaline (about pH 8–9), so it can nudge pH up | You also want potassium; use conservative amounts. |
| Ground limestone (garden lime) | Same active compound in natural rock form | Yes | A general garden lime is enough; compare grade and price. |
| Sulphur-type products | Lower pH | No – the opposite job | Soil is alkaline. |
For more choices, browse the For Acidic Soils range.
How Does It Work in the Soil? (مٹی میں یہ کیسے کام کرتا ہے؟)
CaCO₃ is a base. When it meets acids in the soil, it reacts with them and releases calcium, carbon dioxide and water, which is how acidity comes down. According to Wikipedia’s calcium carbonate article, it dissolves very little in pure water, roughly 47 mg per litre. That is why the correction is gradual, why fine particles help it react faster, and why it must be mixed into soil rather than sprayed or dissolved. The same article describes agricultural lime as powdered chalk or limestone used to neutralise acidic soil, with calcium carbonate as its active ingredient.
How Do You Apply It Safely? (محفوظ استعمال کا طریقہ)
- Test the pH first. Most vegetables and garden plants tend to do well at roughly pH 6.0–7.0.
- Weigh the dose from the table above, ideally on a kitchen scale.
- Protect yourself. Fine mineral dust irritates eyes, nose and lungs, and workplace safety guides set exposure limits for airborne calcium carbonate dust (US NIOSH pocket guide). Wear gloves, a dust mask and eye protection, and apply on a still day.
- Spread evenly over bare soil, mix into the top 10–15 cm, then water in.
- Wait 2–3 weeks before sowing or transplanting. For pots, blend in ahead of time.
- Keep urea apart. Leave a gap of a couple of weeks between this powder and urea or other ammonium-based fertilisers, which can lose nitrogen as ammonia.
- Recheck pH after 6–8 weeks and repeat only if it is still low. Do not add more just because results are not instant.
- Store sealed, cool and dry. Keep out of reach of children and pets. For soil use only, never for eating.
Product Specifications
| Pack Size | Effective Rate | Pack Price | Select |
|---|---|---|---|
500gm | ₨ 320 / KG | ₨ 160 | |
1kg | ₨ 250 / KG | ₨ 250 | |
5kg | ₨ 150 / KG | ₨ 750 | |
25kg | ₨ 84 / KG | ₨ 2,100 |
Is it the same as limestone, chalk or marble powder? (کیا یہ چونا پتھر ہی ہے؟)
They share the same active compound, CaCO₃. Limestone is a rock that is mainly calcium carbonate, while this product is sold by grade, so compare purity and fineness in the specification table. For a general garden lime, either does the same neutralising job.
What do purity and mesh mean?
Purity is the share of the powder that is actually CaCO₃. Mesh describes fineness: a higher mesh number means finer particles, which react with soil acids faster.
Can I just crush eggshells instead?
Eggshells are mostly calcium carbonate, so they work in principle. They break down slowly and in uneven pieces, so a few shells will not noticeably change soil pH. A measured powder is easier to dose and gives more predictable results.
How long does it take to work?
It reacts slowly because it barely dissolves in water. Many gardeners see soil pH and plant response change over several weeks to a few months, faster when the powder is fine and well mixed in.
Will it stop blossom end rot in tomatoes and peppers?
Not on its own. Low calcium is one cause and uneven watering is another, so it helps mainly when a test shows acidic or calcium-poor soil. Mix it into the soil weeks before planting and keep watering steady.
Can I dissolve it in water or spray it on leaves?
No. It dissolves too little for liquid feeding or foliar sprays, and it does not suit hydroponic tanks. Always mix it into soil or potting mix.
Can I use it with compost, urea and other fertilisers?
It pairs well with compost and most fertilisers. Just keep a gap of a couple of weeks from urea and other ammonium-based nitrogen fertilisers, which can lose nitrogen as ammonia.
Can I use it in a worm bin?
A light dusting can help buffer a sour bin, but only a little and only when needed. Add it sparingly, watch how the worms behave, and stop if they try to leave the bedding.
Is it safe around children and pets? (بچوں اور پالتو جانوروں کے لیے؟)
Treat it as fine mineral dust: it can irritate eyes, nose and lungs. Wear gloves and a mask, water it in, keep children and pets away until then, and never let anyone eat it. It is for soil use only.
What is the calcium carbonate price in Pakistan? (قیمت کیا ہے؟)
The current price is ₨ 160. Buying in bulk? Ask for a special discount on WhatsApp
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