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.
The second sign for knowing when do you plant tomatoes is the temperature of the soil that you plant to grow your tomatoes in. Ideally, the soil temperature for the best time for planting tomatoes is 60 F. (16 C.).A quick and easy way to tell if the soil is warm enough for planting tomato plants is to thrust a finger in the soil.If you cannot keep your finger all the way in the soil for a full minute without feeling uncomfortable, the soil is most likely too cold for planting tomatoes. Of course, a soil thermometer helps too.hile knowing the planting time for tomatoes is helpful, many people also wonder how late can I plant tomatoes and still get a crop. The answer to this varies depending on the variety of tomato you have.