You can get fert burns anytime there is an excessive amount of one specific nutrient. One example would be chicken crap (organic), which has very high amounts of nitrogen and tends not to be used.

Plants are like people. Some won't be bothered with higher nutrients in the soil, while others may have a hard time surviving.
thecurious1 Reviewed by thecurious1 on . First time grower, 2.5 weeks ( Its a girl! ) Hey, being new to the cannabis world I decided to try and grow my own plant. I started out with a 6' plant pot. The setup was a large fish tank lined with aluminum foil and quad flourescent bulbs dangleing 3' above. The soil mixture I used is 60% Soil 20% Vermiculite 10% Perlite 10% Guano ( Bat shit) 24/7 Lights on. Significant watering. Some base stems died. Smell is very potent and frog like. Crystaline shell on stems. Pistills beginning to show on preflowers. What do you think? Rating: 5