Dig up the plants as soon as their main production is over and replace them with seedlings for a different crop. As the weather warms, cool-season crops, such as peas, are completing their production. Have young squash or cucumber plants ready to take their place on the trellis. As soon as the broccoli is finished, have tomato plants ready to take its place in the bed. A planting area that's never idle produces a surprising amount of food.What You Need: Instructions:
1. After seedlings have developed two or three sets of leaves, they'll be crowded and need thinning. Remove extra plants to achieve the correct spacing and allow the remaining plants room to grow.
2. Thin a crop of young plants by snipping off the stems at the soil surface. For larger plants, this is preferable to pulling them, when you might damage the roots of neighboring plants.