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I put these in after planting and now it looks like I didn’t dig them in enough as I was concerned about damaging roots.
Some will no doubt be lower down but are the ones on top wasted or worse will this cause roots to grow back trying to get them?
Should these only be used in an initial planting?
Hello @bn71
Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about water storage crystals.
Water storage crystals can be a great way to keep the soil moist, but if they're sitting on top rather than mixed into the root zone, they won’t be very effective. They’ll still absorb water, but instead of gradually releasing it to the roots, they might just dry out faster, especially in hot weather. The good news is that they won’t cause major harm, but they won’t be doing much good either.
Roots generally grow down toward moisture rather than up, so while some surface roots might take advantage of any retained water, it's unlikely to cause significant upward growth. However, if the crystals swell too much on the surface, they can create a slimy layer or even dry into a hard crust, which could affect soil aeration.
Ideally, water crystals should be mixed into the soil at the time of planting so they’re near the root zone, where they can do their job properly. Since you've already planted, you could try gently working the surface ones into the soil without disturbing the roots too much. Over time, some will naturally break down and integrate, especially with regular watering. If you're adding more in the future, try soaking them in water first before mixing them in, as this makes them easier to handle and ensures they won’t absorb all the initial watering away from your plants.
If you have any other questions we can help with, please let us know.
Eric
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