A hydrothermal vent is a fissure in a planet's surface from which geothermally heated water issues. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots.
When to Set out Tomato Plants. The best time to set out tomato plants is after danger of frost, which is usually anytime in April, May or early June. If you started seed indoors, the seedlings should be about 6 to 8 inches tall and hardened off before transplanting outside.
June is the time to plant okra and other warm weather, summer crops. You can also continue to plant melons, beans, celery, tomatoes, eggplant and peppers. You will start to harvest plants set out last month. You can start to divide spring perennials if their foliage has died.