In general, acidic soil mixes specifically designed for acid-loving plants like geraniums may be more expensive than general-purpose potting soils. However, the benefits of acidic soil, such as improved nutrient availability and reduced disease risk, can justify the added cost. The common garden geranium (Pelargonium) is a popular flowering plant known for its vibrant blooms and durability.
Geraniums are not acid-loving plants; they perform best in a soil environment that is slightly acidic or neutral. Understanding the precise pH requirements is the first step toward creating an optimal growing environment for consistent, robust growth and flowering. The Ideal pH.
Key Takeaways - What Plants Do Not Like Acidic Soil Soil's pH level, ranging from 0 (acidic) to 14 (alkaline), significantly impacts plant growth. Neutral soils (pH 7) typically support a broad variety of plants. However, certain plants prefer alkaline soil (pH level above 7), like carnations, geraniums, clematis, and lilacs.
Zonal geraniums grow to heights and widths of 3 feet and are hardy in U.S. Department of Agriculture plant hardiness zones 10 and 11. Elsewhere, they are commonly grown as annuals.
Zonal geraniums grow best in rich, well-draining soil that has a pH level of between 5.8 and 6.3, which is slightly less acidic than what other geraniums prefer. A pH test of your garden's soil is the best way to determine its acidity. However, if you already have a garden bed which includes both acid and more alkaline loving plants, the performance of these plants may have tipped you off to your garden's pH.
Geraniums prefer a higher pH: 6.0. Geraniums prefer mildly acidic soil with a pH level around 6.5, but not highly acidic soil. Learn how to test, adjust, and maintain the soil pH for optimal geranium growth and blooming.
These plants are not overly fussy but do exhibit preferences that contribute to their vigorous growth and vibrant blooms. As popular garden plants, geraniums require proper soil conditions for maximum flowering and growth potential. Soil composition is one of the key factors influencing the overall success of geranium cultivation.
Each type of geranium, including the hardy varieties, may vary. Acid-loving plants come in all sizes, from tall trees to short perennials and annuals. Choose the right plants for your soil type.
There are hundreds of cultivated geranium varieties. Look for different sized plants, flower colors, and leaf and flower forms. 'Orbit' Series grows 14 inches tall, is very early flowering, and produces large clusters of flowers in shades of red, pink, orange and white.
Geranium Crop. Source: Premier Tech. Ammonium-Based Fertilizer It is generally understood that when fertilized with an ammonium-based fertilizer, plant roots exchange acid ions for ammonium ions, which causes a general decrease in growing media pH.
This is also true of urea, which microorganisms in the growing medium convert into ammonium. Geraniums also release acid ions when taking up.