Catawba rhododendron bushes can reach a height of 6'-8' with a spread of 4'-6'. Displays are most effective when rhododendron bushes are massed together. These are poisonous plants -- do not allow children to ingest any of the azaleas or rhododendrons.
Best Answer: Tornadoes are caused by winds. When a tornado forms the wind pressure around the tornado drops and that's what you see on the barometer, the pressure goes down.
Where does the hot and cold air that form a tornado come from? To start off, the warm air cold air are not the direct cause of tornadoes. When cold air plows into warm air, it forces the warm air up causing the moisture in it to condense â¦and form thunderstorms. Given a few other conditions these storms can produce tornadoes.