Soil

Written By Ranferi L.

All trees rely on this very important factor. Soil. It’s possible to plant a tree, and hope for the best. However, all trees have their preferences and many trees thrive on their suited environments.

Here is a way to tell what each soil type represents and their benefits.

Understanding Soil: The Foundation of Tree Health

Healthy trees start with healthy soil. Soil is more than just “dirt” — it’s a living system made of minerals, organic matter, air, and water. The three main soil textures are sand, silt, and clay, and every property’s soil is a unique blend of these. Understanding your soil type helps determine watering needs, root development, nutrient availability, and overall tree performance.

The Three Primary Soil Types

1. Sand

  • Largest particle size

  • Drains very quickly

  • Doesn’t hold nutrients well

  • Trees may dry out faster

Best for: species that prefer dry, well-drained soils

Challenges: requires more frequent watering and amendments to retain nutrients

2. Silt

  • Medium-sized particles

  • Holds moisture better than sand

  • Provides more nutrients

  • Soft, smooth texture

Best for: many ornamental trees and shrubs

Challenges: can compact easily if walked or driven on

3. Clay

  • Smallest particle size

  • Holds water and nutrients very well

  • Can stay soggy and dense

  • Heavier and slower to drain

Best for: moisture-loving trees

Challenges: poor aeration, slow root expansion, risk of root rot if overwatered

Why Soil pH Matters

Soil pH is a measure of how acidic or alkaline the soil is. Most trees thrive in a slightly acidic to neutral pH range: 6.0 – 7.0.

pH affects:

  • Nutrient availability — if pH is too high or too low, trees cannot absorb key nutrients even if the soil contains them.

  • Microbial activity — beneficial microorganisms perform best in balanced pH.

  • Root growth — extreme pH can stress or stunt roots.

Common Texas Issue: High Alkalinity

Many Central Texas soils lean toward alkaline (high pH) due to limestone content. This can cause:

  • Chlorosis (yellow leaves with green veins)

  • Slow growth

  • Poor nutrient uptake

Why Testing Matters

A simple soil test reveals your soil pH and texture, allowing us to:

  • Recommend proper amendments

  • Adjust fertilization

  • Improve watering effectiveness

  • Support long-term tree health

How Capital Arbor Can Help

We can help assess soil conditions to help your trees thrive.

Our goal is to ensure your trees grow in soil that supports:

  • Healthy root development

  • Strong nutrient uptake

  • Drought resistance

  • Longevity and structural stability

Email or Call us today!

Ranferi L.