Using the Seattle Tilth guide, you can sow now, so we did a few weeks ago with radish seeds in our SFG raised beds a small pinch every 2 inches for 16 in the square foot. We covered the soil with burlap bags for the first week & only had to water once as the rain kept it moist enough.

Radish are up, but not carrots since they're slower. The radish help me wait for the carrots. :o) If they don't come up in a week or so we'll sow again, but I bet they're going to sprout soon.