Ipomoea tricolor, also known as morning glory, is a climbing plant that produces beautiful flowers in shades of blue, purple, and pink. Here’s how to sow Ipomoea tricolor mixed from seed in the UK:

1. Choose a suitable time to sow: Morning glory seeds should be sown after the last frost date, which is usually around mid-May in the UK. The soil should also be warm and moist.
2. Prepare the soil: Choose a sunny location with well-draining soil. Add compost or well-rotted manure to the soil to improve its quality.
3. Sow the seeds: Sow the seeds 1cm deep in the soil, with about 30cm between each seed. You can also soak the seeds in water for a few hours before sowing to help with germination.
4. Water and care: Water the seeds gently but thoroughly, and keep the soil moist until the seeds germinate. Once the plants are established, water them regularly but avoid overwatering, as this can cause root rot.
5. Provide support: Ipomoea tricolor is a climbing plant and will need support as it grows. You can use a trellis, fence, or bamboo cane to provide support.
6. Enjoy the flowers: Morning glory flowers will begin to bloom in mid-summer and will continue until the first frost. Deadhead the flowers regularly to encourage more blooms.
7. Harvest the seeds: At the end of the season, allow some of the flowers to remain on the plant and go to seed. Collect the seeds in the autumn and store them in a cool, dry place for sowing next year.

Overall, Ipomoea tricolor is an easy-to-grow plant that adds beauty and interest to any garden. Enjoy watching it grow and bloom!