Best Soil pH for Arum

ByAndrew

Optimal pH Range for Arum

Arum, a genus including plants like Calla Lily and Lords-and-Ladies, thrives in slightly acidic to neutral soil. The ideal pH range for Arum is 5.5 to 7.0. These distinctive plants can tolerate a broader range from 5.0 to 7.5, but optimal growth and flowering occur within the narrower range.

pH Impact on Arum Growth

Arum Nutrient Availability

  • In optimal range (5.5-7.0): Essential nutrients are readily available, promoting healthy growth and vibrant flower development in Arum plants.
  • Below 5.0: Reduced availability of phosphorus and calcium for Arum. Potential aluminum toxicity.
  • Above 7.5: Decreased availability of iron and other micronutrients, potentially leading to chlorosis in Arum leaves.

Arum Root Development

Proper pH supports healthy root and rhizome growth, crucial for Arum’s nutrient absorption and overall plant vigor.

Microbial Activity in Arum Soil

Slightly acidic to neutral soil encourages beneficial microorganisms, enhancing nutrient cycling and Arum plant health.

Arum Cultivation History and Importance

Arum species have been cultivated for centuries, both for ornamental purposes and in traditional medicine. The genus name comes from the ancient Greek word “aron.” Many Arum species are known for their distinctive spathe and spadix flower structure, making them popular in gardens and floral arrangements.

Soil pH Management for Arum

Testing Arum Soil pH

  • Use reliable soil testing methods: professional lab analysis or quality home test kits for Arum planting areas.
  • Test soil before planting Arum and annually thereafter.
  • Sample from multiple locations in the Arum growing area for accurate results.

Adjusting Arum Soil pH

To Lower pH:

  • Apply elemental sulfur or aluminum sulfate to Arum soil.
  • Use acidifying fertilizers like ammonium sulfate for Arum plants.

To Raise pH:

  • Incorporate agricultural lime (calcium carbonate) into Arum planting areas.
  • Add wood ash for minor pH increases in Arum soil.

Arum pH Maintenance Practices

  • Use appropriate fertilizers that don’t drastically alter soil pH for Arum.
  • Mulch around Arum plants with organic materials to help stabilize soil pH.
  • Monitor water quality, as it can affect Arum soil pH over time.

Arum Care Beyond pH

  • Plant Arum in well-draining, humus-rich soil.
  • Provide partial shade to full sun, depending on the Arum species.
  • Water Arum regularly during the growing season, reducing in dormancy.
  • Apply a balanced, slow-release fertilizer to Arum in early spring.
  • Divide Arum rhizomes every 3-4 years to maintain vigor and control spread.
  • Be cautious of Arum’s toxic properties when handling or planting near children or pets.