Ideal Soil pH for Cestrum

ByAndrew

Cestrum’s Optimal pH Range and Its Importance

Cestrum thrives in a soil pH range of 6.0 to 7.5, preferring slightly acidic to slightly alkaline conditions. This pH range is crucial for Cestrum’s growth, flowering, and overall health. Within this range, Cestrum can effectively absorb essential nutrients, particularly iron and magnesium, which are vital for its lush foliage and the production of its fragrant flowers. The plant’s adaptability to various soil types contributes to its popularity in gardens and as an ornamental shrub. While Cestrum can tolerate a wider pH range (5.5 to 8.0), maintaining the ideal range ensures optimal performance and bloom production. In highly acidic soils (below 5.5), Cestrum may experience reduced nutrient availability, especially calcium and phosphorus. In strongly alkaline soils (above 8.0), the plant might suffer from iron chlorosis, affecting its leaf color and overall vigor. Proper pH management is essential for promoting vigorous growth, abundant flowering, and maintaining the plant’s characteristic night-time fragrance.

Adjusting Cestrum’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 Cestrum Cultivation

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