What spacing adjustments help in hot climates?
Written by
Michael Sullivan
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Hot climates require Pepper plant spacing adjustments to head off heat-induced stress. When temperatures exceed 90°F (32°C), more space is necessary between plants to provide better air circulation. I learned this the hard way, losing peppers to sunscald during a particularly hot period. Correct plant spacing helps keep peppers cooler and healthier during scorching weather.
Increase spacing by 2 to 4 inches during the heat wave, the increased spacing results in a significant decrease in leaf temperature. Combine the wider spacing with straw mulch, as this will also cool the soil. Use shade cloth with a 30% shade during the most severe parts of the day in the summer. Water once a day, twice if possible, since water evaporates, and the roots are down to 3 feet or so. I use all the above in my Arizona garden every summer.
Mulching Methods
- Apply 3-inch straw layer to cool roots
- Use light-colored mulch to reflect heat
- Refresh mulch monthly in peak summer
Shading Solutions
- Install 30% shade cloth from 10am-4pm
- Use movable frames for adjustable coverage
- Position shade on west side for afternoon sun
Watering Strategies
- Water at 5am and 5pm during heat waves
- Use drip irrigation to target roots
- Add water-absorbing crystals to soil
In extreme weather conditions, it is recommended to check over plants twice daily. Watch for wilted leaf tips or sun scald patches on the plant. I recommend using soil temperature thermometers to determine temperature in the root zone. Temperatures above 85°F (29°C) prompt attention to corrective measures. The construction of temporary shade structures is an effective method for protecting plants during heat surges.
Alter watering levels due to changing spacings. Larger spaces cause more evaporation since the ground is more exposed. Increase the volume of water applied by 20% for every inch increase between plants. I use drip lines with adjustable emitters for accurate application. This provides the roots with sufficient moisture without wasting any water.
Adjusting plant spacing prevents blossom drop and sunscald and keeps pepper plants producing throughout the summer. With your new spacing adjustments, you will achieve consistent and continuous harvests from your plants. Make these changes before your first heat wave arrives in your area.
Read the full article: Pepper Plant Spacing Simplified
