April is a great time to plant greens like spinach, lettuce, cabbage and mustard greens. Plant now so you will get some greens to eat before it gets too hot. When it is hot they will bolt and become bitter. They can be grown in part shade to last longer when the heat comes. The spinach was actually started last spring and made it through the winter and the chartreuse and purple bok choi were put out 3 weeks ago. All are covered at night with row cover.
Other good crops to plant in April are bok choi and chard. They are real workhorses in the garden being able to withstand our cold and hot seasons. They can be grown in part shade to full sun.
Also good crops to plant in April are beets and carrots. Be sure to plant these in areas of your garden that are getting full sun and water 2 times a day until they are up.
Of course all this is dependent on your soil being warm enough now. How warm should your soil be? Between 40-60 degrees. How do you know how to tell? Get a soil thermometer and stick it in your soil about 2 inches deep. Here is a soil temperature chart to help you know when to plant veggies.
And these plants should still be covered with row cover at night because of our cold temperatures.