IQ Test 1. IQ Test For April's edition of our IQ Test, let's take a look at selecting and planting vegetables. IQ Test 1. Adding lime to soil neutralizes acid and results in a higher pH number. Lime should be added in the fall every year.
Sulfur is used to make garden soil more acid.
Dandelion, purslane and lamb's quarters are weeds. A good rule of thumb is to water the vegetable garden lightly every evening.