Ideal Soil pH for Chaste Tree

ByAndrew

Chaste Tree’s Optimal pH Range and Its Importance

Chaste Tree (Vitex agnus-castus) thrives in a soil pH range of 6.0 to 7.8, preferring slightly acidic to slightly alkaline conditions. This pH range is crucial for the Chaste Tree’s growth, flower production, and medicinal properties. Within this range, Chaste Tree can efficiently absorb essential nutrients, particularly iron and magnesium, which are vital for its distinctive purple flower spikes and aromatic foliage. The tree’s adaptability to various soil types contributes to its popularity in landscaping and herbal medicine. While Chaste Tree can tolerate a wider pH range (5.5 to 8.2), maintaining the ideal range ensures optimal performance and vitex compound production. In highly acidic soils (below 5.5), Chaste Tree may experience reduced nutrient availability, especially calcium and phosphorus. In strongly alkaline soils (above 8.2), the tree might suffer from iron and manganese deficiencies, affecting its growth and bloom quality.

Adjusting Chaste Tree’s Soil pH

Lowering Soil pH:

  • Sulfur
  • Aluminum sulfate
  • Iron sulfate
  • Pine needle mulch

Raising Soil pH:

  • Agricultural lime
  • Dolomitic lime
  • Wood ash (in small quantities)
  • Bone meal

Testing Soil pH for Chaste Tree Cultivation

  • pH test strips
  • Digital pH meter
  • Soil testing kit
  • Professional lab analysis
  • Colorimetric soil test