Go for it. Yes, you are late depending on the plants. But the other option is to buy them. We started tomatoes, cukes, and green peppers Feb 22. Should have started the green peppers earlier. They are painfully slow. Started zucchini and sunflower 3-23. Started beans outside and covered them 3-26. Just started a second cucumber planting today to string them out longer into the fall. Cucumbers and beans are in the ground now. Tomatoes and zucchini are begging to be planted at this point.