Enjoy geraniums. Plant hydrangeneas. And stop watering your onions and garlic.

5 things to do in the garden this week:

1. You can test the drainage of any soil by digging a hole 1 foot deep and filling it with water. If the soil drains within four hours, you have decent drainage. If the soil requires more than four hours to drain you have a drainage issue that could lead to soil fungus problems, and significant soil amelioration with organic amendments is recommended. And then there’s the simple shovel test: Is your soil easy or difficult to dig? If you have a hard time digging...