Despite this week’s summer temperatures, the weather will chill across the mountains this weekend. Here are tips from a horticulture expert on when you should start planting for summer. Don’t be fooled by the flowers and tomato plants on sale across the region, says Christy Bredenkamp Horticulture Extension Agent for NC State. We aren’t past the “frost-free” date just yet: “So the Internet says the end of April is the last frost date and May 4th or 5th and May 10 and May 15th. I’ve seen all