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.
Tomatos require a full day of sunlight. A native of South America, the tomato (Solanum lycopersicum) is a frost-tender perennial most commonly grown as a summer annual. Tomatoes are among the most giving of summer fruits, with healthy plants offering up to 15 pounds of juicy, nutrient-rich fruits. Tomatoes require plenty of sunlight in order to produce flowers and fruit. Tomatoes require a bare minimum of six hours of direct sunlight, though a full day of sun is preferable. Tomatoes grown in shadier conditions will be leggier and more sparse, producing fewer flowers and fruits and succumbing to diseases and pests far more often.