A waste of money

I purchased two of these for my classroom. They were planted right away. Neither of the plants really grew. They just sat there. About a month after they were planted one started to have its leaves turn black. Soon after the first one turned black and died the second one is also doing the same thing. I have other creeping Charlies and they are growing and rooting like crazy. These appear to be healthy when they arrive but considering every other plant loves the conditions in my classroom these were a huge disappointment.

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