Answer: I'm not sure where Larkspur, CO is located, but if you're in the mountains you're either zone 3 or 4, on the plains zone 5. Denver is zone 5. You can plant any and all vegetables in Colorado. Start cool season vegetables such as broccoli, cauliflower, lettuce, carrots and potatoes a week or two before your last frost date. Seed or tranplant tomatoes, peppers, cucumbers, squash and beans and other warm season vegetables after the last frost date. Contact a local garden center for specific dates and vegetables to grow.
Q&A Library Searching Tips