This is the summary of consumer reviews for Jobe's 5001T Houseplant Indoor Fertilizer Food Spikes. The BoolPool rating for this product is Excellent, with 4.70 stars, and the price range is $1.52-$4.14.

The Jobe's 5001T Houseplant Indoor Fertilizer Food Spikes help in keeping your houseplants healthy and fertilized very easily. Spikes provide a continuous supply of important nutrients right at the roots, where plants need it most. The premeasured, specially formulated spikes are simply inserted into the soil around your plant. Unlike liquids or granular, Jobes Houseplant Spikes eliminate mess, hazards and smells and cant wash through when you water to save chemical runoff. It can feed roots for up to 60 days and you don't have to worry about mixing fertilizers in water or remembering to fertilize. These spikes are very easy to use and store. Some users find these good for aquarium plants too.

Overall, the Jobe's 5001T Houseplant Indoor Fertilizer Food Spikes are very inexpensive and good product for fertilizing your plants.

Directions:

For best results, insert new spikes every 60 days.  Just push each spike into the soil around the plant, halfway between the plant stem and the edge of the pot, until the spike is just below the surface.  The nutrients are gradually released to the plant's roots safely and continuously, every day.  Water after inserting spikes.

Pot Diameter (inches):    Recommended no. of spikes

      4                                                2

      6                                                3

      8                                                4

      10                                              5

      12                                              6