WE planted ten 4 ft leyland cypress trees this spring. We live in northern Oklahoma. All of the trees but 3 are doing great. The three that aren't are paler green, the branches seem a bit droopy and they just looked stressed and not as healthy as the others. We have them mulched and are watering with a drip system about every 8-10 days when the soil seems to be drying out on top. We are in very hot conditions right now with daytime temps staying the high 90's to 100's. The trees seemed to being doing ok until the extreme heat started. The trees do not have yellowing or signs of insect damage on them. Wondering what is going on with them. All three of these trees are planted next to each other at the end of the row.
Certified GKH Gardening Expert
3 to 4 inches of hardwood mulch is good to use to help with moisture retention. Make sure you pull the mulch away from the trunk in about a 6 inch diameter.
In your growing zone you should water your Leland Cypress with 1 gallon of water for every inch of trunk diameter-once a week.
Follow this schedule for the first 6 months. You will need to make adjustments for rain.
Leland Cypress can take months to began active growth and become established, especially in warmer climates.
Here is a link with more care information.