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.
Planted in containers tomatoes require the most soil you can provide and good drainage. Planting time. Tomatoes grow best when the day temperature is between 65Â° and 85Â°F. Tomatoes will not grow in soil cooler than 55Â°F and tomato flowers will not set if the air temperature goes below 55Â°F.