When is the best time this year to plant in Toppenish, Washington?
Your last frost date is May 1 to May 10.
It depends on what you're planting and when you're planting. Here's a pdf that gives dates for planting in spring/fall for your area:
They've also included planting by the moon dates, as well.
The last frost date is April 15, should be ok to plant seeds - frostdate.com/
You can start planting when the date of your last frost has passed. A good way to determine this is by contacting your local Extension office www.gardeningknowhow.com/
Last frost in Toppenish, Washingtonlast in 2022 will be around May 21-31 www.plantmaps.com/
So you can start planting after May 31st.
You do not say if you're planning to plant plants or if you plan to start a garden of edible plants so you may do best if you Google your plant name and ask when is the best time to plant (name) in zones 6b-7a or whatever your planting zone happens to be.
however, most of the articles do not state the date the article was written so you may have a slight variation in the exact dates the last frost will be over but the dates will be very close for every year.
You can ask the question about any type of plant: vegetables or other plants and get loads of information about the plant.