blight can also be in the water, so if you gather your own rainwater, pay attention...

blight is a fungi, its spores spread throughout the air, just like all other molds and fungi... but it can also be in the water...

and, it can also be in the soil as you said...

you never want to splash any plants with dirt, if you are splashing your plants hard enough for dirt to end up on the leaves to cause blight, then you are watering your plants way too violently....

people think that "it will make them tougher" well, it can and does the exact opposite, you will get less fruit and it wont be as good...

as far as greenhouses, you can get every single type of pathogen in a greenhouse as you can in outside... they are EVERYWHERE... they are on you right now, as we speak...

treat your plants with respect, and they will reward you with their fruits...

i just proved this to my GF this year, by not gardening this year and letting her do it.... guess who won the comp?


chuck the Miracle Grow and go and get some organic "house blend" hydro nutrients from your local hydro store, and thank me later....