Frequent mowing results in a denser stand of grass that is more resistant to weed invasion. That is, never remove more than a third of the grass' height at any one mowing. Avoid mowing too low. Mowing low favors weeds such as crabgrass and annual bluegrass. Crabgrass won't germinate without light, and taller grass keeps light from reaching the crabgrass seeds at the soil surface.
Taller grass is also more wear tolerant.
Fewer worn areas mean fewer spots for weeds to take hold. Indoors Onions can be easily started for transplanting by growing your own onion plants. Onion seedlings are very spindly and the seed usually adheres to the end of the seedling for several weeks. After the onion seedlings are 2 to 3 inches tall, apply a soluble fertilizer with each or alternate waterings. In early March, move the plants to an outdoor, protected location for a few weeks prior to field planting.