Lisa writes: Last summer and fall, Tom ripped out hundreds of feet of ivy from the yard. And if you've ever tried to remove ivy, you know that it doesn't come quietly. Tom dragged this stuff out of the ground, inch by inch, by the sweat of his brow in the sweltering Virginia humidity. The ivy had to go because it was trying to eat our house. As it stands, our house is depreciating in value every year anyway (Thanks, County Assessor Dude!), so being eaten wouldn't help matters. Pulling out the ivy saved the house, but now the bare soil is eroding every time it rains. The land has been increasing in value every year (Thanks again, County Assessor Dude!), so we have a vested interest in not seeing it swirl down the sewer system. Tom has been trying to grow grass in the bald patches for a couple of weeks now, but the seeds won't sprout. Yesterday, we finally identified the culprit: Me. The combo fertilizer/weedkiller I spread over the lawn a couple of months ago? The stuff ...