Phlox, both annual and perennial varieties, are known for their beautiful and vibrant blooms. However, when it comes to hot weather, phlox can be a bit finicky. Most varieties of phlox are not very heat tolerant and may struggle to thrive in regions with high temperatures. That being said, there are some heat-tolerant varieties available that can withstand hotter conditions.
In my personal experience, I have found that phlox tends to prefer cooler temperatures and partial sun. Planting them in a site that receives some shade during the hottest parts of the day can help prevent them from wilting or getting scorched by the sun. Additionally, providing them with well-draining soil is crucial, as phlox does not like to have its roots sitting in water. If the soil is too heavy or compacted, it can retain moisture and cause root rot.
It is also important to note that phlox is an annual plant, meaning it completes its life cycle within one growing season. This makes them more susceptible to environmental conditions, including heat. Perennial phlox, on the other hand, have a better chance of surviving and even thriving in hot weather once established, as they have a stronger root system.
To help phlox cope with hot weather, there are a few strategies you can implement. One option is to provide them with some shade during the hottest part of the day. This can be accomplished by planting them near taller plants or using shade cloth. Another option is to mulch around the base of the plants to help retain moisture in the soil and keep the roots cooler. Applying a layer of mulch also helps to suppress weeds, which can compete with phlox for water and nutrients.
Watering is another critical factor when it comes to phlox and hot weather. While they don’t like to sit in wet soil, they do require regular watering, especially during periods of drought. It is important to strike a balance and ensure that the soil remains moist but not waterlogged. Deep watering once or twice a week, depending on the weather conditions, is generally sufficient. However, be cautious not to overwater, as this can lead to root rot.
When selecting phlox for hot weather conditions, look for heat-tolerant varieties. These varieties have been bred to withstand higher temperatures and are more likely to thrive in hotter regions. Some popular heat-tolerant phlox varieties include ‘Flame Series,’ ‘Intensia Series,’ and ‘Gisele Series.’ These varieties have been known to perform well in hot and humid climates.
While most varieties of phlox are not very heat tolerant, there are heat-tolerant varieties available that can be grown in hot weather. Providing partial shade, well-draining soil, and regular watering can help phlox cope with heat stress. Additionally, selecting heat-tolerant varieties can increase your chances of success in hotter regions.
