may lawn & landscape

May Lawn & Landscape Tips

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In all the years I’ve been in the lawn and landscape industry I don’t believe I have experienced two identical springs.  Everything we do is based on air and soil temperatures, as well as soil moisture. So, we make are spring service plans and schedule services all based on the average spring weather.    

But, does average ever happen when it comes to weather? 

This spring has been almost perfect when it comes to a good gradual warm up without the usual extreme temperature swings. We didn’t experience the typical above normal temperatures followed by a late freeze.  The result was an April with some of the best spring color I can remember.   All the spring blooming trees, shrubs and flowers put on a show! 

With one exception, this has been a perfect spring.  Both air and soil temperatures have lagged behind.  This has been a slow-to-get-here spring resulting in slow turf development.  Fescue was slower than normal to regain full color.  I mowed my fescue lawn less in March than I can ever remember.  Finally, fescue color and development came around in April.  Even warm season turf has also lagged a couple of weeks behind in green up and development. 

Now with the arrival of May and the abundant moisture we are receiving, your lawn and landscape is positioned to take off for the summer.   

Here are a few tips for May:

Pre-Emergent Application – Between late April and the end of May, it is critical you receive your second pre-emergent application of the year.  A pre-emergent creates a barrier over the soil that prevents weeds from germinating.  Routine activity, such as mowing and play, as well as heavy rains, all break down the barrier we created with our first application of the year.  Application #3 is a key step in strengthening the barrier and giving you season long control.  The effectiveness of all pre-emergent herbicides is increased when the product is watered into the top ½’-1” of the soil Please make sure you do your best to follow the watering instructions we leave when making your application.

Post-Emergent Application – Weeds that are not prevented, both grasses and broadleaf, require additional treatment to control.  Now that the warm season turf is coming completely out of dormancy, control of weeds can be stepped up.  Application #3 contains broadleaf weed control mixed with the pre-emergent for additional control.  Grassy weed control will continue on an as needed basis in a safe manner to limit turf damage. 

Nutsedge  often begins to show up in lawns in late May.  The pre-emergent herbicide we use will help with prevention, but it isn’t 100% and some spot treatments can be expected.  But, since Nutsedge is a result of tight, wet soils, annual aeration is the best practice.    

Nutsedge often begins to show up in lawns in late May.  The pre-emergent herbicide we use will help with prevention, but it isn’t 100% and some spot treatments can be expected.  But, since Nutsedge is a result of tight, wet soils, annual aeration is the best practice.    

Turf Fertilizer – Bermuda lawns need a good feeding as they start into their prime growing season.  For fescue lawns May is the last month to strengthen fescue before going into the most stressful time of the year for a cool season turf.  After May, excessive nitrogen can harm fescue and often results in disease issues. 

Anytime we make an application of weed control or fertilizer, please let us know if you have any concerns 10-14 days after our visit. If the turf isn’t greening up properly, or if weeds are not wilting, we want to know. If you are new to our program, we know it will take time to get your lawn to the healthy condition you desire. But we expect to make progress with each visit. We know this may require additional visits and if you are on our full 7- Step Program, we will make the needed extra visits.

Anytime we make an application of weed control or fertilizer, please let us know if you have any concerns 10-14 days after our visit. If the turf isn’t greening up properly, or if weeds are not wilting, we want to know. If you are new to our program, we know it will take time to get your lawn to the healthy condition you desire. But we expect to make progress with each visit. We know this may require additional visits and if you are on our full 7- Step Program, we will make the needed extra visits.

Tree & Shrub Care –  May is the month to watch for bagworms on needle evergreens. We subscribe to an integrated pest management approach.  With our Tree & Shrub Program, we inspect for bagworms and treat as needed.  Bagworms are very easy to control when they are small.  But, they are very hard to see when they first start to develop.  If you notice bagworms, or have a concern about your plants, please let us know

Tree & Shrub Care – May is the month to watch for bagworms on needle evergreens. We subscribe to an integrated pest management approach.  With our Tree & Shrub Program, we inspect for bagworms and treat as needed.  Bagworms are very easy to control when they are small.  But, they are very hard to see when they first start to develop.  If you notice bagworms, or have a concern about your plants, please let us know

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Lawn Maintenance – Both warm and cool season turf grasses need frequent mowing now.  One of the most important things for good turf health is to avoid removing more than 1/3 of the grass in one mowing.  Not only does it not yield you the best looking lawn when you cut below the leaf and into the stem of the grass, it also weakens the root system.  Try to maintain your Bermuda on the middle setting or just below the middle setting in May.  For fescue, raise the setting one notch this month and cut around 2.5”.  At the end of the month it is best to have fescue at a maximum height going into the summer. 

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Seasonal Color – Now time to install your summer annual color.  Most landscapes look best with a splash of bright color creating a welcoming environment near the front door.  Impatiens and Caladiums are great choices for full shade areas.  Begonias, petunias, and geraniums do well in sun to part shade.  Periwinkle, lantana, and penta are good at handling the heat and full sun.

Irrigation  – The average rainfall in the Oklahoma City area in the last 7 days is over 2 ½”.  All the Mesonet sites in the area are all reporting ample soil moisture.  Please conserve water and leave your irrigation off or put it on a rain delay for the next 5-7 days.  If you have subscribed to our Irrigation Management program with the Rainbird Wi-Fi Link, we have been delaying your irrigation the last few weeks based on rainfall and soil moisture measurements.   During May your lawn and landscape needs 1 -1 ½” of moisture per week as temperatures start reaching into the 90s. Remember to always water based on need.  

Irrigation – The average rainfall in the Oklahoma City area in the last 7 days is over 2 ½”.  All the Mesonet sites in the area are all reporting ample soil moisture.  Please conserve water and leave your irrigation off or put it on a rain delay for the next 5-7 days.  If you have subscribed to our Irrigation Management program with the Rainbird Wi-Fi Link, we have been delaying your irrigation the last few weeks based on rainfall and soil moisture measurements.   During May your lawn and landscape needs 1 -1 ½” of moisture per week as temperatures start reaching into the 90s. Remember to always water based on need.  

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Azalea Care  – Wow!  What a show they put on this year.  After Azalea’s bloom it is time to fertilize and prune.  Prune between bloom drop and the end of June.  Pruning after mid-summer will result in less blooms next year.  Azaleas look best when minimally pruned and allowed to retain their natural shape.  Prune by removing longer shoots by reaching down and making cuts where they come off a larger branch.  This will improve air moment and promote healthy growth.  Avoid shearing azaleas. Fertilize now with a controlled release azalea food.  Now is also the best time to add a fresh layer of mulch.  As temperatures rise the mulch will keep the soil cooler and retain moisture.  The best mulch for azaleas is pecan hulls or pine bark.  

Azalea Care – Wow!  What a show they put on this year.  After Azalea’s bloom it is time to fertilize and prune.  Prune between bloom drop and the end of June.  Pruning after mid-summer will result in less blooms next year.  Azaleas look best when minimally pruned and allowed to retain their natural shape.  Prune by removing longer shoots by reaching down and making cuts where they come off a larger branch.  This will improve air moment and promote healthy growth.  Avoid shearing azaleas. Fertilize now with a controlled release azalea food.  Now is also the best time to add a fresh layer of mulch.  As temperatures rise the mulch will keep the soil cooler and retain moisture.  The best mulch for azaleas is pecan hulls or pine bark.  

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If you have any questions, please drop us an email or give us a call at (405)367-3873.

Our mission is to make sure you have a lawn and landscape that improves the appearance, enjoyment and value of your surroundings.

Lorne Hall