wikiHow is where trusted research and expert knowledge come together. Though, using its Plant Food ability maybe detrimental to the next level, the player should bring Power Lily as well in order to use the Iceberg Lettuce's full potential for the subsequent waves. Is it okay to plant lettuce in the winter? Allow 25cm (10in) between rows. If Plant Food is given to it, all zombies will freeze. Removing all plant matter after growing a garden is very harmful to soil health and soil nutrient levels. My iceberg lettuce is growing tall but not forming heads. Iceberg lettuce is grown year-round in California and Arizona and is shipped throughout the United States and Canada where it makes its way, in various forms, to grocery stores, restaurants, and food service establishments. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/71\/Grow-Iceberg-Lettuce-Step-1-Version-3.jpg\/v4-460px-Grow-Iceberg-Lettuce-Step-1-Version-3.jpg","bigUrl":"\/images\/thumb\/7\/71\/Grow-Iceberg-Lettuce-Step-1-Version-3.jpg\/aid4147582-v4-728px-Grow-Iceberg-Lettuce-Step-1-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"
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