When To Fertilize Grass In Seattle

Mow regularly at 2 inches.

When to fertilize grass in seattle.

Grass seed needs warm soil mild temperatures and regular irrigation to germinate and grow. If you only fertilize as part of your lawn maintenance once a year autumn is the best time to do it. Special to the seattle times if you fertilized your lawn only one time per year the best time to do it would be between the end of the second week in november and the end of the first week in. April and may are the best months for sowing grass seed in seattle according to washington state university extension.

In fact your lawn would appreciate a light application of fertilizer in early fall and again in late fall. Simply break up the yearly requirement of nitrogen into the appropriate number of applications say one or two in spring and two or three in fall for cool season grasses three over the summer for warm season grasses. For maximum appearance fertilize your lawn about once every six to eight weeks during their active growth period. Annual grass pre emergent control dethatch april mow 4 times a month may mow 4 6 times month fertilize broad leaved weed control june mow 4 6 times a month fertilize july mow 4 times a month august mow 4 times a month september mow 4 times a month fertilize early in month broadleaved weed control october mow 2 3 times a month november.

Especially if your lawn didn t get fertilizer in late november be sure to do the april treatment. Apply an organic lawn fertilizer and keep the soil surface moist until the seedlings get tall enough to mow. However you can start a new lawn or overseed an existing lawn as early as mid march if the soil isn t too wet says seattle gardening expert ciscoe morris. Rake and overseed bare spots or plant new lawn if it s not excessively wet or cold.

The timing suggested by turf specialists is april 15 june 15 sept. Remember not to remove more than one third of the lawn s height at any given time. That means the best times to plant grass in seattle are spring and fall when rainfall will make your job easier. Get the job done by mid october and before you know it your lawn will look good enough.