Those cacti on your windowsill don’t deserve to die. Even if you regularly fail at horticulture, the EasyBloom can help. Just leave it in your proposed planting area for 24 hours, either stuck in the dirt or propped up in its cradle, then plug it into your computer’s USB port. The gizmo measures soil conditions, sunlight, temperature, and humidity, comparing the results with an online database to recommend species that will thrive there. And should the weather be wacky that day, the EasyBloom is smart enough to check the National Weather Service for local averages. Your data is stored online for quick reference. If you’ve already killed everything in the garden, plunk the sensor down in your little Death Valley, set it to Monitor mode, and let it tell you what you’re doing wrong. But here’s a tip: If you find yourself running the autopsy repeatedly, it could be something basic. You do have to water the crops, you know. The EasyBloom can’t do everything for you.