May 04, 2021 7:00 PM

FICK: ​Plants slow to leaf out

Posted May 04, 2021 7:00 PM
<b>written by: Lauren Fick - Cottonwood Extension District</b>
written by: Lauren Fick - Cottonwood Extension District

There have been a number of plants that have either died over winter or been slow to leaf out.  In some cases, this is likely due to accumulated stress.  We often think of plants reacting to stress that happened during the current season or possibly the previous year but it may not be that simple.  I think this all started during the winter of 2017 - 2018.  Many areas of Kansas had virtually no rain or snow from November through most of April during that winter.  This put plants under a tremendous amount of stress.  

Plants under stress often react by setting an abnormal number of fruit buds.  This helps ensure the survival of the species even if the parent plant dies.  So lots of fruit buds were set during 2018.  Those buds matured into flowers and then fruit (seeds) during 2019.  Think back to last year.  I have never seen certain plants bloom as well as they did last year.  Maturing this much fruit takes a great deal of energy.  I think this resulted in such low energy levels in the fall that the plants just didn’t have enough energy to make it through the winter or may have delayed leaf out.  Areas with too much rain last summer had that additional stress added to the mix.  Roots need oxygen as well as water and too much rain can damage root systems.

So what do we do?  The only thing we can do now is try to avoid any further stress.  Basically, that means watering during dry weather.  Don’t overdo it as too much moisture can damage root systems.  The goal is to keep the soil moist but not waterlogged while allowing the top of the soil surface to dry between waterings.

Lauren Fick is the Horticulture Extension Agent for the Cottonwood Extension District. If you have questions, she can be contacted by e-mail at [email protected] or by phone at 785-628-9430 or 620-793-1910. K-State Research and Extension is an equal opportunity provider and employer.