We are sorry to hear that your Earthgro Black Mulch faded after a rain. We do recommend applying this on a day when rain is not expected, so that the colorant can dry and set, otherwise, it may be washed off before it can set. We want you to be confident in our products. For this reason, we offer a product guarantee to our consumers. At your earliest convenience, please call us and refer to your review to see what can be done. Our phone number is 877-220-3089.