It takes about another two weeks for the first true leaves to appear. These are either slow to germinate in cool soil, with the risk of rot, or cannot survive a spring frost. You need to plan for staggered plantings so that the harvest is spread out over a longer period and there isn't an embarrassing quantity of one thing all at once. An easy way to accommodate a second or third planting date is to leave rows unfinished and repeat with the same crop 2 or 3 weeks after the first seeding. I like to include flowering plants in the vegetable garden.
Nasturtiums are an ideal vegetable garden companion.
The leaves and flowers are tasty in salads and serve the purpose of keeping flee beetles and aphids away from the other vegetables. Gladiolus are always a nice feature as well as sunflowers and marigolds. Daisy Moore, 1998.