What weather would you like more ? 
Dry weather:
Wet weather:
What weather do you have ? My summers varies a lot - sometimes it is very rainy, sometimes there is so little rain.
For dry weather it is best to have spot near the water and use gasoline or 12v electric pump to pump water for plants. Put mulch above the ground to retain water. Add water polymer crystals, they're really good
.
For wet weather. After rain, if you can, shake the plants, especially budding ones, to shake the moisture off and prevent mold. If mold get you anyway, cut the affected buds 4-5 centimeters from where you see mold. I heard that growers use Hydrogen Peroxide (3%) to kill remaining mold spores. Just spray plant with it. There is various fungicides either, but remember, you are going to smoke this stuff.
Try using dry or organic fertilizer, more compost, supersoil, manures, bat guano etc. Or slow acting fertilizer. Most liquid form fertilizer will be washed away when it rains.
Tomato planters water the soil 15-20 days before planting with copper sulphate solution to kill harmful bacteria and viruses. Use 2 tablespoon copper sulphate for 10 liters of water. It's not good, but better than bunch of dead plants.
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Guys write what climate you have, bad stuff related to it that I forgot to tell, and of course - how you fight it.
This summer is incredibly wet. I had botrytis on my auto plants already. I cutted it and sprayed plants with hydrogen peroxide:water (1:1).
It seems like my BioBizz fertilizer don't help my plants. I sprinkled some bat guano with high P for my autos which is flowering.
Worse thing - so little sun. Very bad summer :/

Dry weather:
- -Plants need lots of water
- -More chances of sunny days - it is rather good
- -What else? :/
Wet weather:
- -Mold problems
- -Rain washes most water-soluble fertilizer
- -Bigger chance of root rot.
What weather do you have ? My summers varies a lot - sometimes it is very rainy, sometimes there is so little rain.
For dry weather it is best to have spot near the water and use gasoline or 12v electric pump to pump water for plants. Put mulch above the ground to retain water. Add water polymer crystals, they're really good

For wet weather. After rain, if you can, shake the plants, especially budding ones, to shake the moisture off and prevent mold. If mold get you anyway, cut the affected buds 4-5 centimeters from where you see mold. I heard that growers use Hydrogen Peroxide (3%) to kill remaining mold spores. Just spray plant with it. There is various fungicides either, but remember, you are going to smoke this stuff.
Try using dry or organic fertilizer, more compost, supersoil, manures, bat guano etc. Or slow acting fertilizer. Most liquid form fertilizer will be washed away when it rains.
Tomato planters water the soil 15-20 days before planting with copper sulphate solution to kill harmful bacteria and viruses. Use 2 tablespoon copper sulphate for 10 liters of water. It's not good, but better than bunch of dead plants.
***********************************************************************
Guys write what climate you have, bad stuff related to it that I forgot to tell, and of course - how you fight it.
This summer is incredibly wet. I had botrytis on my auto plants already. I cutted it and sprayed plants with hydrogen peroxide:water (1:1).
It seems like my BioBizz fertilizer don't help my plants. I sprinkled some bat guano with high P for my autos which is flowering.
Worse thing - so little sun. Very bad summer :/