You have purchased a new product for flower growth, the product is an estrogen extract, this allows the flower to stay in bloom longer but respecting the doses. You use this product on your hydrangeas and in a few days, they have flowered, you continue to use this product the following days but one day, through clumsiness, you spill the product on your hydrangeas. A few seconds later, the hydrangeas have become giant and they start releasing spores on you.