Soil enhancer
Organic compost
Organic fertilizer
Organic potting soil
Gypsum
Rock dust mineral
Multistep organic lawn care products [such as Organica or Cockadoodle Doo]
Physical / mechanical control
Sticky barrier
Netting
Coconut oil slug barrier Gypsy moth trap   
Japanese beetle trap   
Hornet & wasp trap   
Biological controls
Bt for caterpillar
Bt for mosquitoes
Beneficial nematodes
Milky spore
Earth worms   
Ladybugs   
Praying mantises     
Lacewing   
Alternative Pest control treatment
Diatomaceous  earth   
Insecticidal soap (potassium salt ) 
Herbicidal  soap  (potassium salt ) 
Horticultural oil / Dormant oil
Sulfur fungicide
Corn gluten   
Garlic oil insect repellent
Lemon & vinegar herbicide
Hot pepper repellent   
Neem oil 
Citrus insect killer 
Composting aid  / Activator
Microbial compost innoculant

Click here for a partial list of Massachusetts retailers who have carried organic products. Not all stores carry all products.