TrueNute Soft Rock Phosphate Powder 16 Ounces for Aquaponics Hydroponics and Soil for Plants Stronger Than Liquid

Trusted worldwide for Aquaponics to be fish/people and bacteria safe. FREE SHIPPING ON ALL ORDERS!!! Phosphorus deficiency is most often manifested as purple coloring of the leaves, particularly the leaf veins. In severe cases the whole plant may take on a purple hue. One of the quickest and easiest ways to spot a phosphorous deficiency is by the purple color that will often show up in the plant leaves. Then you will have leaves that will have dead brown spots on the leaves that will sometimes look as though the leaves have been squashed. You will also note that plants that are stricken with this deficiency will tend to be spindly with sparse growth although reaching near normal height. In some cases the leaves will will appear dark green to bluish green. The purple color is normally found on the bottom side of older growth leaves. Sometimes tomatoes that are grown at too low of a temperature will show the sames signs, so yet another reason to keep your water and air temps at a tolerable level. The plants that need the most phosphate are those that produce a lot of seeds. These are your phosphate hogs, and if they are lacking, your fruit will most likely be misshapen and small.