Jobe's Flowers Synthetic Fertilizer, Multicolor 22 oz

The premeasured, specially formulated spikes are simply inserted into the soil around your plant. Unlike liquids or granular, Jobe's Flowering Plant Spikes eliminate mess, hazards and smells and can't wash through when you water. Push spikes into the soil around the plant until they are just below the surface, halfway between the plant stem and the edge of the pot. Water after inserting the spikes. For best results replace spikes every 8 weeks in the growing season. Store in a cool dry place and keep out of the reach of children. Pot diameter, number of spikes needed: 10 cm 4 inches, 2; 15 cm 6 inches, 3; 20 cm 8 inches, 4; 25 cm 10 inches, 5; 30 cm 12 inches, 6.