To make homemade potting mix, you mix potting soil, organic material like humus or compost, and something for drainage, such as coarse sand and gravel, in manageable proportions. Then, adjust the recipe according to the plant: for succulents, cacti, or houseplants.
Using inexpensive ingredients, even kitchen scraps, you save money, adapt the substrate to your city's climate, and avoid killing plants due to overwatering. See, step by step, how to prepare ready-to-use mixes for your apartment or backyard.
What is potting mix and why is it not just "soil"?
Potting mix is a mixture specifically designed for pots, not just pure soil. This combination helps the roots breathe properly and prevents common problems like root rot.
Imagine a pot filled with heavy backyard soil in São Paulo. This soil becomes waterlogged easily and can kill a pothos plant, causing its leaves to turn yellow.
But with a light substrate, with sand and organic matter, the plant becomes full of healthy shoots. According to IBGE (2022), residential gardening has grown with more people living in apartments, increasing the use of pots.
Difference between regular soil and potting mix.
Common soil, taken directly from the ground, is usually heavy and has poor drainage. It generally compacts quickly and retains too much water, which damages delicate roots.
Therefore, potted plants need something different. The substrate includes sand or stones to loosen the soil and extra nutrients.
Why homemade potting mix works better in pots
With homemade substrate, you control what goes into the mixture. Then, you can adapt it to your small space, like an apartment in Belo Horizonte.
Thus, plants like ferns grow strong. In this sense, they age more slowly and require less frequent replacement.
Over time, the substrate loses nutrients. So, take a look to see when it's time to change the soil in the pot. in this practical guide.
Homemade substrate materials that are easy to find in Brazil.
To make homemade potting soil, use potting soil that's easy to find in Brazil. Think of common items like coarse construction sand or compost from the market.
For example, a resident of Goiânia buys sand at a hardware store, reuses construction gravel, and adds humus. This forms a solid base for pots at home.
Surveys of garden centers in 2023 show an increase in the sale of coconut fiber and humus in small packages. Therefore, more people are trying inexpensive homemade recipes.
Additional materials expand the options. Worthy of note are activated charcoal for acidifying pH and rice husks for light water retention.
Basic components: soil, drainage, and organic matter.
Topsoil acts as a structural base. Collect it from your own garden or buy it pre-fertilized in bags.
For drainage, coarse sand and gravel prevent waterlogging. Use about half a kilo of each for a bucket of soil.
Organic matter, such as compost, provides nutrients. For example, that rotten onion peel you have in the kitchen can be used.
Mix everything in equal parts for balance. This way, the substance remains healthy.
Additional materials: charcoal, coconut fiber, perlite, and rice husks.
Charcoal controls odors and mold. Add three handfuls to large mixtures.
Coconut fiber retains moisture, ideal for pots in hot climates. Found in gardening stores for less than R$ 10.
Perlite and rice hulls increase porosity. But use sparingly, like 10 grams per pot, to prevent it from drying out quickly.
This variation allows for a more customized substrate. Therefore, it adapts to any Brazilian plant.
| Material | Function | Where to buy it | Approximate cost |
|---|---|---|---|
| Topsoil | Nutritional base | Gardening fair or club | R$ 5-10 per bag |
| Coarse sand | Fast drainage | hardware store | R$ 2-5 per kilogram |
| Humus or compost | Organic nutrients | Open-air market or online | R$ 4-8 per package |
| Coconut fiber | Retain water | Green supermarket | R$ 6-12 |
| Charcoal | pH control | Pharmacy or fruit and vegetable store | R$ 3-6 |
How to make homemade potting soil step by step
For the substrate recipe, start by mixing the dry ingredients first. Use simple tools like a plastic bowl.
For example: a person in Rio de Janeiro mixes 2 buckets of soil, 1 of coarse sand, and 1 of gravel. They sift everything to remove large stones.
Embrapa (2020) highlights that drained mixtures reduce fungus. For this reason, sterilize beforehand for stronger plants.
During preparation, avoid making a mess and wear gloves. The substrate will then be ready in 30 minutes.
If you need homemade organic compost, see ways to produce it. here.
Basic 2:1:1 recipe for most potted plants.
Mix 2 parts topsoil. Add 1 part coarse sand and 1 part gravel.
For 3 buckets, succulents or pothos plants are suitable. In this case, it provides a balance between nutrition and oxygen.
This guideline applies to a variety of climates. However, adjust it if you live in a humid place, like Recife.
The result? Plants grow without extra effort.
How to sift, mix, and sterilize substrate at home.
Use a kitchen strainer to separate debris. Remove old roots or stones so the roots can breathe.
Next, mix in a large bucket. Lightly moisten to even it out, without soaking it.
To sterilize, bake in the oven at 200°C for 30 minutes. Or, leave in the sun for several days to kill germs.
This step prevents disease. Then, the substrate becomes safe for immediate use.
What recipes should I use for succulents, cacti, and houseplants?
For succulent substrate, increase drainage with more sand. For example, 3 parts sand, 1 part soil, and 1 part gravel.
In Curitiba, residents use extra gravel to help succulents withstand the cold. In Salvador, coconut fiber helps ferns retain moisture.
Pothos plants in São Paulo thrive in humus. Floriculture reports from 2023 indicate high sales of succulents for apartments.
Adjust these variations for each plant. This way, you avoid watering errors.
Well-draining mix for succulents and cacti.
For succulents and cacti, focus on 60% coarse sand. Add 30% potting soil and 10% charcoal.
These dry quickly, preventing rot. For example, a small pot in Porto Alegre benefits from this mix for the harsh winter.
Good drainage prevents overwatering, so plants stay beautiful for months.
Caution: Do not add heavy hummus here.
Wetter mix for common houseplants
For maranta or pothos, use 50% soil, 30% compost, and 20% coconut fiber. It retains water longer.
This recipe is great for dry apartments. In Belo Horizonte, it prevents leaves from falling due to lack of humidity.
Shade-loving plants will appreciate it. But monitor watering weekly to avoid prolonged soaking.
Excellent results with minimal effort.
| Plant Type | Ideal Proportions | When to Use |
|---|---|---|
| Succulents and Cacti | 3 parts sand, 1 part soil, gravel | Cold climates or small pots |
| Indoor plants (pothos, maranta) | 2 parts soil, 1 part compost, 1 part coconut fiber | Damp apartments |
| Flowers in a vase | Equal parts: soil, sand, humus | Sunny backyards |
How to care for the substrate daily so it lasts longer.
To make houseplant substrate last longer, protect it from compaction. Add organic mulch to the surface.
In Belo Horizonte, residents use pine bark to reduce watering. It helps with moisture for weeks, according to Embrapa (2021).
Water moderately and test the soil. This way, the substrate won't wilt the plants.
Replenish nutrients with lightweight fertilizer. See the guide for more information. here.
Drainage at the bottom of the pot and a layer of mulch.
At the bottom, put a layer of gravel. This prevents stagnant water and horrible root growth.
Next, cover with bark or dry leaves. About 2 centimeters of mulch retains moisture without mold.
This technique prolongs the life of the substrate. Therefore, use it for exposed pots.
Check weekly and adjust coverage.
How to adjust watering and fertilization to avoid ruining the mixture.
Water only when the surface is dry. Touch it with your finger to feel.
Use diluted liquid fertilizer every month. Avoid excessive solid fertilizer to prevent burning the roots.
This helps maintain the substrate's balance, ensuring plants always bloom.
If you notice compaction, loosen it slightly.
Common mistakes with homemade substrate and how to solve them.
A common mistake is using waterlogged soil at home, which causes fungus. Roots rot and plants die.
In Recife, roots are damaged by excessive watering. But fixing it is simple: add more sand and reinforce the drainage holes in the pot.
Extension technicians (2022) say that too much water kills more vases. So, extra caution is needed.
To correct this, replace half of the substrate. Then, observe the rapid change.
Waterlogged substrate, fungi, and rotting roots.
When waterlogged, fungi grow rapidly. Leaves turn yellow and fall off.
Solution: Stir the substrate and add gravel. Water less to allow the bottom to dry out.
Use coffee filters in the bottom of the toilet bowl. This way, it drains properly and restores its health.
If it's late, replant in a fresh mix.
Choose a mild liquid fertilizer. Try compost tea. as a natural fertilizer.
Very poor or compact mix: simple signals and corrections.
Poor soil mix indicates weak plants. Small leaves signal a lack of nutrients.
Correction: Add fresh compost. Loosen the soil to loosen the compacted structure.
In dense climates, like the hot climate of São Paulo, it prevents compression. Therefore, blood vessels breathe better.
Test periodically and adjust proportions.
Quick questions about potting mix for homemade pots
For homemade substrate in a small apartment, opt for a lightweight mix. Use coconut fiber to save space.
How much charcoal for a 20 cm pot? Three tablespoons, enough for succulents in Porto Alegre's cool climate.
Answer practical questions like this. Of course, it saves money.
What's the best mix for someone living in a small apartment?
In an apartment, opt for coconut fiber and sand. Mix 40% fiber, 40% sand, and 20% soil.
It takes up little space. Plants like pothos like it.
It prevents soil from spilling. Therefore, it's easy to clean.
Ready-made or homemade substrate: when is each one more worthwhile?
Homemade is cheaper and more personalized. But ready-made guarantees consistent quality.
Homemade to save money. Ready when you're short on time.
Choose according to your needs. In large cities, home-based living is more common.
Homemade potting mix is a simple blend of soil, drainage, and organic matter that you can adjust for succulents, cacti, and houseplants. Remember the preparation tips, daily care instructions, and common mistakes to correct.
Test the basic recipe in a pot, observe the results over several weeks, and comment on which mixture worked best. Feel free to ask questions so we can share our experiences.
