Written by Luke
The short answer is no, bouncy castles don't damage grass under normal conditions.
Of course, if you left a bouncy castle in the same place for several weeks, it probably would start to cause damage. But for a normal bouncy castle hire, grass is surprisingly resilient.
I'm writing this in September 2026, after we've had a couple of months with very little to no rain. At one point, much of the grass looked completely dead. Yet after just a couple of weeks of rain, it has all started coming back to life.
It's amazing just how resilient grass can be.
Why Does Grass Turn Yellow Under a Bouncy Castle?
Grass can turn yellow when it is under stress from a lack of sunlight. When covered by a bouncy castle, the grass receives little to no light and will start producing less chlorophyll.
Chlorophyll is the green pigment that plants use to absorb light and create energy through photosynthesis. Without enough light, the grass produces less chlorophyll and its green colour can begin to fade, leaving it looking pale or yellow.
This doesn't necessarily mean the grass is dead. Once the bouncy castle is removed and the grass is exposed to sunlight again, it can begin to recover.
How Long Does Grass Take to Recover After a Bouncy Castle?
Under normal conditions, the grass will usually recover within a week once the bouncy castle has been removed and it is exposed to sunlight again.
It can, of course, take longer during particularly hot or dry weather, especially during a drought when the grass is already under stress from a lack of water.
Do Bouncy Castle Pegs Damage Your Lawn?
The only other damage you are likely to notice comes from the pegging-in process. We use pegs that meet the BS EN 14960 requirements, which are 16 mm thick and 380 mm long.
We find the holes left by the pegs are only a temporary issue. We've returned to gardens just a few weeks after a previous hire and haven't been able to find the original holes.
If you really look after your lawn and want to help the holes disappear more quickly, you can fill them with a small amount of sand and soil mix.
Should You Mow the Grass Before a Bouncy Castle Hire?
Yes, mowing the grass before your bouncy castle hire is a great idea. However, mowing it on the morning of the party, or even a day or two beforehand, can mean lots of loose grass cuttings get carried onto the bouncy castle during the party, which doesn't look great.
For a weekend bouncy castle hire, we recommend cutting the grass on Wednesday. This gives the loose grass cuttings a few days to settle or disappear while still leaving you with a freshly cut lawn for the party.
What If the Grass Is Wet or Muddy?
If the grass is already wet or muddy before we set up the bouncy castle, you may notice a little more temporary damage to the lawn.
With people walking around the inflatable and the additional weight of the bouncy castle, wet ground can become flattened or slightly muddy in places. However, in our experience, this normally just means the grass takes a few extra days to get back to normal once the castle has been removed and the ground has had a chance to recover.
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