As homeowners, landscape designers, or garden enthusiasts, we always strive to maintain a vibrant and healthy lawn throughout the year. However, achieving this goal can be quite a challenge, given the varied climate changes and transitions that different seasons bring along. Among the various types of grasses that adorn our lawns, warm-season grasses, such as Bermuda and Zoysia grass, are renowned for their ability to endure hot, dry climates. Yet, understanding their seasonal transitions is key to ensuring optimal growth and resilience.
Which grasses are Warm-Season
and which grasses are Cool-Season?
Warm-Season:
- Bermudagrass
- Zoysiagrass
- Centipede
- St. Augustine
Cool-Season:
- Fescue
- Bluegrass
- Ryegrass
- Bentgrass
With the passage of each season, these warm-season grasses go through unique transitions that are essential to their growth and overall health. Let’s take a closer look at the journey warm-season grasses take from spring to winter.
Spring Awakening: Warm-Season Grasses Spring into Life
As we wave goodbye to the frosty winter, the warm-season grasses start transitioning from their dormant state. During spring, the temperatures rise, and the grass begins to green up. If done properly scalping your lawn can accelerate the green-up process , which involves mowing the grass to 1 inch during this transition. This allows more sunlight to reach the base of the grass, stimulating growth.
By mid-April, it is generally a good time to fertilize warm-season grass, even if the lawn has not fully greened up yet, since the risk of a late frost is usually low by that point. Apply a slow-release fertilizer rich in nitrogen to support healthy spring growth as the lawn moves into active growth.
In the spring, warm-season grasses are vulnerable to weeds, so be sure to apply a pre-emergent herbicide to prevent weed germination.
Regular mowing at the correct height encourages dense growth and keeps your lawn looking neat and vibrant.
Summer Strength: Warm-Season Grasses Flourish
As temperatures rise and daylight hours extend, warm-season grasses hit their peak growth. Their deep root systems are designed to exploit the warm soil temperatures and survive drought conditions. During the summer, the grasses should be watered deeply but infrequently, promoting the growth of deep roots.
It’s also important to maintain a consistent mowing height of 1.5 inches. This height supports healthy growth, reduces stress, and keeps your lawn thick enough to shade the soil and naturally suppress weeds. Avoid the temptation to mow taller — 1.5 inches remains the standard height even during summer. A post-emergent herbicide can be applied if necessary to handle any persistent weed threats.
Autumn Adjustments: Preparing Warm-Season Grasses for Winter
When fall approaches, warm-season grasses start to slow down their growth and prepare for the dormancy of winter. This period is a good time to address any issues like soil compaction or thatch accumulation that could hinder the grass’s health in the coming seasons. Aeration can be performed to alleviate soil compaction and improve nutrient uptake, while dethatching can remove excessive organic debris from the lawn surface.
A late fall fertilizer application, usually a winterizer, can help strengthen the grass’s root system and store energy for the next spring. As temperatures drop, some homeowners opt to slightly lower mowing height to 1 inch to help prepare the lawn for dormancy. However, sticking with 1.5 inches is still a safe and effective standard. Avoid scalping or cutting too short, which can expose the lawn to cold damage.
Winter Dormancy: Warm-Season Grasses Rest and Recharge
Winter marks the natural dormancy period for warm-season grasses. The blades will turn brown, which is a healthy response to colder weather as the grass conserves energy. Watering needs decrease, but occasional moisture is still important — especially during dry winter spells.
Avoid fertilizing during this time, as it may trigger unwanted growth. Also limit foot traffic on dormant lawns to prevent damage to the grass crowns.
Warm-Season Grasses: Resilient Choice
Warm-season grasses are a resilient choice for hot climates, and their seasonal transitions are a testament to their adaptability and survival. By understanding these transitions and adjusting lawn care practices accordingly, we can ensure that these grasses flourish throughout the year.
Questions?
If you need assistance selecting the perfect grass variety for your space, reach out to the Turfgrass Professionals at NG Turf at 770.832.8608 or info@NGTurf.com, who are ready to provide expert guidance and help you create a beautiful, thriving lawn tailored to your specific needs.
