Geodes can be found all over the world. Areas with the most geodes, however, tend to be deserts, volcanic ash beds, or areas with plentiful limestone. In the United States, for example, you can find plenty of geodes in California, Arizona, New Mexico, Utah, Nevada, Iowa, Missouri, Illinois, Indiana, Kentucky, and Ohio.
Water and Sunlight. Basil plants are low-maintenance and do not require much care. What little care they require, however, is important to keeping the herb healthy and the foliage supple. Too much water, too little water and lack of sun will turn the basil leaf tips brown and cause them to curl. Basil -- whether growing indoors or out -- requires at least six hours of full sun to keep it healthy.
Fusarium Wilts and Rots Fusarium crown rot is responsible for the brown streaking in the vascular tissue in the stem of this tomato plant (Lycopersion); note, green pith. Fusarium wilts and rots are fungal disease caused by Fusarium oxysporum that affects many perennial and annual plants. Whether the name wilt or rot is used can vary amoung plant hosts and how the disease develops. For example, the plant may exhibit signs of wilting, but the cause is a rot in the roots.