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.
Fertilizer From spring to summer, feed your tree every three weeks with a high-nitrogen fertilizer made for citrus (a tomato and vegetable formula can be substituted). Feed half as often in fall and winter. Pests Citrus are vulnerable to scale, spider mites, mealybugs, and aphids.