What are the Toughest strains (handle stress well) to grow? aka easy to grow strains.

I wanted to ask the RIU community on their take of which strains are the toughest. While I wouldnt mind an easy grow, I need some genetics that can handle temps of 100 degrees farenheit in the summer (outdoor) and temps of 20 degrees farenheit in a greenhouse in the winter ( if the heat went out in the greenhouse, would the strain in mind survive?). Strains that are mold resistant, etc., the list goes on. A juggernaut strain is what im looking for. On my research ive found blueberry, northern lights, ghost train haze. Any input from my fellow growers would be awesome.

depending on your definition of a strain being able to handle its environment, most will survive these temp swings occasionally outdoors with good ventilation and every other resource provided. Know that those temp swings will be the limiting factor then, the reason the weed wont be as good as it could, yield as much as it could have, taste as sweet, stone as strong too. But yes, the plants can handle these conditions. All cannabis will mold when conditions are ripe for the fungi.
the GTH might be the strongest weed you'll ever smoke.....good luck

Every environment has micro-climates. A micro-climate can be 5-10 degrees cooler than the surrounding area. With-in that micro-climate you can further adjust the environment in favor of the plant. Observation and planning are keys to a better grow. Every good grower develops these qualities.