I planted 5 grapefruit seeds and 1 of them came up yellow. How? I used the same potting mix and they get the same sun. : r gardening Kira Artificial Magnolia Tree Potted Plant 28" Agave Titanota Blue Seeds Organic, Heirloom, Non GMO Succulent Seeds Neeraseeds Choose the Best Soil for Your Container Garden Brown Thumb Mama 9 Ways to Improve Your Soil for Stronger, More Productive Tomatoes