True Living Organics - The Ultimate Guide to Growing All-Natural Marijuana Indoors (2012)

You can also buy commercially available organic spikes like the ones above
Using these spikes, along with the layering technique that I will explain later, allows you to add
additional amounts of powerful all-natural dry nutrients without frying your plants, which is what
would happen if you mixed these nutrients globally into a soil mix. Dry nutrients like steamed bone
meal and blood meal can be used in spikes very effectively. My spikes are placed close to the
container rim, so the roots have to grow a bit to reach them. In a typical 2-gallon container, planning
for a 9-week flowering plant with a final height of about 2.5 feet tall, I would have my spike hole
about ½ an inch wide and about 90% of the height of the container. So, if my container was 1 foot tall,
let’s say, my spike holes would be about 10–11 inches deep. A surprising amount of spike blend can
be poured into these holes. After filling the holes, simply add a shredded bark mulch layer on top and
water everything well.