Posts Tagged ‘grow room setup’

Marijuana Fertilizer

Marijuana likes a lot of food,  but you can do damage to  the  plants if you are too zealous.

Some fertilizers can burn a plant and  damage its roots if used in to high of a  concentration.   Most  commercial  soil will have enough nutrients in it to sustain  the plant for about three weeks of growth so you don’t need to  worry  about  feeding your plant until the end of the third  week.   The  most  important thing to remember is to introduce the  fertilizer  concentration  to  the  plant gradually.   Start  with  a  fairly  diluted  fertilizer solution and gradually increase  the  dosage.   There  are several good marijuana fertilizers on  the  commercial  market  Most fertilizers cause a ph change  in  the soil.  Adding fertilizer to the soil almost always results in  a more acidic ph.

As  time  goes  on,  the amount of  salts  produced  by  the  breakdown  of fertilizers in the soil causes the soil  to  become
increasingly  acidic  and eventually the concentration  of  these  salts in the soil will stunt the plant and cause browning out  of
the foliage.  Also, as the plant gets older its roots become less  effective  in  bringing  food  to  the  leaves.    To  avoid  the
accumulation of these salts in your soil and to ensure that  your  plant  is  getting all of the food it needs you  can  begin  leaf
feeding your plant at the age of about 1.5 months.   Dissolve the  fertilizer in warm water and spray the mixture directly onto  the  foliage.   The leaves absorb the fertilizer into their veins.  If  you  want to continue to put fertilizer into the soil as well  as
leaf feeding, be sure not to overdose your plants.

Remember to increase the amount of food your plant  receives  gradually.  Marijuana seems to be able to take as much fertilizer  as you want to give it as long as it is introduced over a  period  of  time.   During the first three months or so,  fertilize  your  plants every few days.   As the rate of foliage growth slows down  in the plant’s preparation for blooming and seed production,  the  fertilizer  intake  of the plant should be slowed down  as  well.   Never fertilize the plant just before you are going to harvest it  since  the fertilizer will encourage foliage production and  slow  down  resin production.  The most  organic  of  fertilizers:   worm castings.   As you may know, worms are raised  commercially for sale to gardeners.   The breeders put the  worms  in  organic compost mixtures and while the worms are  reproducing  they eat the organic matter and expel some of the best  marijuana  food around.   After the worms have eaten all the organic  matter  in  the compost,  they are removed and sold and the  remains  are  then sold as worm castings.   These castings are so rich that you  can grow marijuana in straight worm castings.   This isn’t really  necessary  however,  and  it  is somewhat  impractical  since  the  castings  are  very expensive.   If you can afford them  you  can,  however,  blend  them in with your soil and they will make a  very good organic fertilizer.

 

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Nutrients For Medical Marijuana

 

Nitrogen, Phosphorus, and Potassium. 

These 3 ingredients are usually listed on the front label of the plant food in the order of N-P-K. A 20-20-20-plant food has a Nitrogen level of 20%.

Secondary nutrients are Calcium, Sulfur and Magnesium. In trace quantities, boron, copper, zinc, iron, and manganese.

Different nutrients are needed at different times. For rooting and germination, levels of high P nutrients with less N/K are needed. Vegetative growth needs lots of N a complete 20-20-20 with trace elements should do it. Watch for calcium, magnesium, sulfur and iron levels too. These are important. One tablespoon of dolomite or hydrated lime is used per gallon of growing medium. It is possible with passive hydroponics, to get nutrient build-up over several feedings, to the point the medium is over saturated in nutrients. Just feed straight water now and again, until you notice the plants are not as green (slightly), and then resume normal feeding.

Use weaker plant food mixtures than normal, maybe 25%, and be sure your leaching once a month and running straight water through the plants at least every other time you water. This applies mainly to plants grown in soil mediums.

Use of light strength Oxygen Plus plant food (or Food Grade Hydrogen Peroxide) allows the roots to breath better and prevents problems with over-watering. Check soil to be sure there are no PH anomalies that might be due to Hydrogen Peroxide in the solution. (Be sure your medium has good drainage. At this point, if your watering soil based plants once a week, you can water every 3-5 days instead if you plant them in a medium with better drainage. Pearlite or lava rock will greatly increase the drainage of the medium and make watering necessary more often. This will pump the plants; they will tend to grow faster because of the enhanced oxygen to the roots. Make sure the plant medium is almost dry before watering again, as the plant grows faster this way.

Stop all plant food 2 weeks before harvesting, so that the plants do not taste like plant food. (This applies to hydroponics as well.)

WARNING: Do not over-fertilize. Always read the instructions for the fertilizer being used. Use 1/2 strength if adding to the water for all feedings in soil or hydroponics if you are unsure of what your plants can take. Build up slowly to higher concentrations of food over time. Novice soil growers tend to over-fertilize their plants. Mineral salts build up over time to higher levels of dissolved solids. Use straight water for one feeding in hydroponics if it is believed the buildup is getting too great. Leach plants in pots every month. If your plants look REALLY green, withhold food for a while to be sure they are not being over-fed.

Grow-A-Room

Construction and Consulting

231-855-1705

growaroom@yahoo.com


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