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10 Indoor Plants That Thrive on Coffee Grounds (+ Care Guide)

#5 – African Violet: A Delicate Coffee Romance

African Violet: A Delicate Coffee Romance

When I first mentioned using coffee grounds on my African Violets at our local garden club, you should have seen the horrified looks! But after sharing my before-and-after photos, those same doubters are now some of my biggest converts. These sensitive beauties have a special relationship with coffee grounds – you just need to know their love language.

The Gentle Art of Coffee Ground Feeding

Let me tell you about my breakthrough moment. After killing two African Violets with straight coffee grounds (yes, I was that person), I discovered that these delicate plants prefer their coffee extremely diluted:

  • Mix 1 tablespoon used coffee grounds in 1 quart water
  • Let steep for 24 hours
  • Strain through cheesecloth twice
  • Use only once every 3-4 weeks

The Perfect Soil Blend for Blooming Success

Here’s my winning soil recipe that keeps my violets blooming almost year-round:

  1. 3 parts African violet specific soil
  2. 1/2 part dried and pulverized coffee grounds
  3. 1/2 part perlite
  4. Pinch of dolomite lime to balance pH

Signs Your Violet is Loving Its Coffee

The transformation in my violets was subtle but significant:

  • Deeper green leaves with a healthy sheen
  • More compact growth pattern
  • Stronger, thicker leaf stems
  • Intensified flower colors
  • Multiple crown development

Understanding the pH Balance

This was my biggest learning curve. African Violets are actually quite picky about their soil pH:

  • Keep soil between 6.0-6.5 for optimal growth
  • Test pH monthly when using coffee grounds
  • Add lime if soil becomes too acidic
  • Monitor leaf color as pH indicator

My Proven Application Schedule

Through careful observation, I developed this routine:

  1. Weekly watering with plain water
  2. Coffee solution every 3-4 weeks
  3. Reduced feeding during winter
  4. Extra dilution during hot months

Troubleshooting Common Issues

Let me save you from my early mistakes:

  • Never allow leaves to get wet with coffee solution
  • Watch for leaf curl (sign of over-feeding)
  • Monitor crown for rot
  • Check for salt buildup monthly

Secret Pro Tips

Here’s what took my violet game to the next level:

  1. Apply coffee solution at room temperature only
  2. Water from the bottom to prevent leaf spotting
  3. Use morning coffee grounds (less acidic)
  4. Create a humidity tray with pebbles and water

My absolute best discovery? Mixing my coffee ground solution with a tiny bit of liquid seaweed. The combination created the most amazing blue-purple blooms I’ve ever achieved!

Ready to meet another coffee ground champion? Wait until you see what happened to my Spider Plant! Click next to learn how this common houseplant developed the most incredible variegation and babies I’ve ever seen, all thanks to a unique coffee ground feeding schedule. I’ll show you exactly how I turned an ordinary Spider Plant into a stunning showpiece with runners for days!

What do you think?

Written by The Home Growns

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