Get greener indoor plants thanks to these Jobe's plant fertilizer spikes! These plant food sticks are greenhouse tested to promote quick greening and ensure your house plants are as beautiful as can be. They're super easy to use: just insert them in the soil and wait for the spikes to dissolve. If your plants are growing slowly, have weak stems or pale leaves, these plant food spikes may be just what you need. They work by delivering nitrogen, phosphorus, and potassium to the soil, which helps promote flowering and root growth, healthy foliage, stress resistance, and stem strength. Each pack includes 30 spikes. This product is 100% natural and safe for environments with pets and small children.