Osmosis moves water through a barrier from where there is more water to where there is less. Here, twelve cauliflower plants are split into four groups, each watered with a different solution: Epsom salt (MgSO4), table salt (NaCl), potassium chloride (KCl), or plain water (H2O). When salt dissolves in water, it reduces the free water available outside the root barrier. That means roots in salt solutions pull in less water. Over ten days, only the plain water group grew taller, and it also produced the longest roots at 12.4 cm. Table salt caused the biggest height loss, an average drop of 1.12 cm.