Challenges of Hydroseeding under trees.

2014-05-14 09.54.27

We have no problem dragging our hose anywhere we need to go to get hydro seed where it needs to be. But there are some areas where grass just does not belong. You would not want to grow a lawn under your deck right? Not only would it be very difficult to mow but it would never get the sunlight it needs to survive. As a rule of thumb for growing a lawn if the lawn is not getting at least 3-4 hours of filtered sunlight it may be a better option to consider a better shade tolerant ground cover.

Always Green uses grass varieties that do very well in both sun and shade. We always tell our customers that our hydro seed will grow just fine in shadier areas but over time it will thin out if there is not enough sunlight. Areas that stay wet and not dry out will start to grow moss and may become more dominant than the lawn.  The only way to correct this is to thin out the trees to let more light through. Not only are there challenges with light but there is also many tree roots under ground competing with the grass roots. Your tree roots are stealing the moisture and nutrients that your lawn needs. Not only that but sometimes if it does not rain heavy enough the raindrops get caught in the canopy of the trees and never make it to the ground. Since a shaded lawn does not photosynthesize as a lawn in full sun it is not using as many nutrients so your tress are getting fed more. You can actually over feed a lawn in the shade as it can’t utilize the nutrients as quickly.

During the establishment phase there is a higher risk of erosion under trees. We use enough tacking agent to keep the hydro seed in place without washing away under most extreme rainfall conditions. Anytime you take on additional water running off flat surfaces, downspouts and water shed off of trees all bets are off. There is really no problem with a heavy rain drops falling straight down on a hydro seeded area with little to no problems. Once the rain gets collected in a tree canopy the raindrop size changes to much larger drops and come down at a more forceful rate causing certain erosion leading to spotty results. When this happens re-seeding will most likely be needed.

So if your going to hydro seed around a tree canopy make sure your getting enough sunlight for the lawn to survive. Moss is usually a good indicator there is not enough light. Have your soil pH tested, ideally it should be right around 6.5 ideally. Thin out the trees as much as possible to let more light through. Plan on over seeding  yearly with a shade tolerant seed. Be sure your lawn is getting the right amount of water using rain gauges and do not over fertilize. Understand the potential of erosion if the lawn does not get established before torrential rains.



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