How to make my own Indoor Potting Soil

Creating your own indoor potting soil is a great way to ensure the best conditions for your houseplants while avoiding unnecessary additives. Here’s a simple guide to making a well-balanced indoor potting mix.

Basic Ingredients for Indoor Potting Soil

1. Coco Coir or Peat Moss (50%)

   • Retains moisture and provides aeration.
   • Coco coir is a sustainable alternative to peat moss.

2. Perlite or Pumice (20-30%)

   • Improves drainage and aeration.
   • Perlite is lightweight and holds some moisture, while pumice is heavier and provides more aeration.

3. Compost or Worm Castings (10-20%)

   • Adds organic nutrients for plant growth.
   • Worm castings boost beneficial microbes.

4. Horticultural Charcoal (Optional, 5%)

   • Helps absorb toxins and prevents soil compaction.
   • Ideal for indoor plants that need better root health.

5. Limestone (Optional, Small Amount)

   • Used if adding peat moss, as it neutralizes acidity.

Step-by-Step Mixing Instructions

1. Measure and Combine Dry Ingredients

   • Mix coco coir/peat moss, perlite/pumice, and compost/worm castings in a large container.

2. Moisten the Mix

   • Add water gradually while stirring until the mixture is moist but not soggy.

3. Store Properly

   • Store in an airtight container or bag in a cool, dry place.

Specialty Mixes for Specific Plants

• Succulents & Cacti: Use more perlite/pumice (40-50%) for extra drainage.
• Orchids & Epiphytes: Add bark chips for aeration.
• Seed-Starting Mix: Skip compost, and use fine perlite for delicate roots.

Would you like a specific mix recommendation for a plant you own?

yes, like Peas, Strawberries, mini carrots, small onions, etc.

For peas, strawberries, and mini carrots, you'll need a potting mix that retains moisture while offering good drainage and nutrients. Below are custom indoor potting soil mixes for each:

1. Peas (Snap Peas, Snow Peas, etc.)

Soil Needs: Loose, well-draining, slightly moist, and nutrient-rich.
✅ Potting Mix Recipe:

• 50% Coco coir or peat moss (moisture retention)
• 30% Compost or worm castings (nutrients)
• 20% Perlite or coarse sand (drainage and aeration)
• Optional: Add a small amount of garden lime to balance acidity if using peat moss.

📝 Tip: Peas have shallow roots, so use a deep, well-draining pot and avoid overwatering.

2. Strawberries (Everbearing or June-bearing)

Soil Needs: Rich in organic matter, slightly acidic (pH 5.5-6.5), well-draining.
✅ Potting Mix Recipe:

• 40% Coco coir or peat moss (light and moisture-retentive)
• 30% Compost or worm castings (organic nutrients)
• 20% Perlite or pine bark fines (for aeration and drainage)
• 10% Horticultural sand or pumice (extra drainage)
• Optional: A sprinkle of bone meal for root growth and fruiting.

📝 Tip: Avoid heavy, soggy soil—strawberries hate waterlogged roots. Use a shallow, wide container for best results.

3. Mini Carrots (Thumbelina, Parisian, etc.)

Soil Needs: Loose, sandy, and well-draining to encourage root growth.
✅ Potting Mix Recipe:

• 50% Coco coir or peat moss (moisture balance)
• 30% Horticultural sand or perlite (prevents compaction)
• 15% Compost or worm castings (gentle nutrients)
• 5% Vermiculite (helps retain moisture evenly)

📝 Tip: Mini carrots need a deep pot (at least 6-8 inches) with light, fluffy soil—avoid compacting the mix.

For small onions (green onions, pearl onions, or spring onions) grown indoors, you need a loose, well-draining soil mix that provides moisture retention without waterlogging. Since onions are shallow-rooted, the soil should be light, fluffy, and rich in nutrients.

🧅 Small Onion Potting Mix Recipe

✅ Ideal Soil Needs: Loose, fertile, well-draining, slightly acidic to neutral (pH 6.0-7.0).

Mix Ingredients:

• 40% Coco coir or peat moss (retains moisture but stays airy)
• 30% Compost or worm castings (adds nutrients for steady growth)
• 20% Perlite or coarse sand (improves drainage and prevents soggy roots)
• 10% Vermiculite (helps retain moisture evenly for steady root development)
• Optional: Add bone meal or rock phosphate (boosts root and bulb formation)

🌱 Growing Tips for Small Onions Indoors

✅ Use a wide, shallow container (at least 6 inches deep) with drainage holes.
✅ Keep soil evenly moist but not soggy—overwatering can cause rot.
✅ Place in a bright, sunny spot (or use grow lights for 10-12 hours of light).
✅ Avoid heavy soils that compact easily, as onions need loose, aerated soil for proper bulb formation.