i would like to start to grow outdoors.

1) can i move indoor strain outdoors and vice verse? what would be easier?
2) It is better to grow in a greenhouse or under clear sky?
3) how old at least plants should be to succesfuly replant them outdoors?
4)what strains you would suggest that would disguise in the enviroment by the color or maybe by some other parameters?
5)what should be the minimum temperature when to start growing outdoors?
I come from Latvia, Riga lat 56°, long 24.°

April - min 1°C, max 10°C
May - min 5°C, max 20°C

Baltic state growing... That's a new one, it can be done, many Canadians grow successfully so you should be able to grow but April is too early in your area, would wait until early/mid May, perhaps even late May, your climate is actually better than Canada's because it is slightly warmer, you should start by picking a tough strain, I'm not sure where you want to grow, but you need to give more details, I'm also curious about any Russian growers, freakin Ruskis got to be growing something, who knows, elaborate and you shall be helped ...,

It would be better to start an outdoor strain indoors, transplant at 3/4 weeks with ACCLIMATION, you should try some Ruderalis Skunk or something, northern growers to the rescue on this one....

thx.. i'll give it a try with the Ruderalis skink

Amber Trichromes befor the cool moist weather, unless in a greehouse. My seasons end is end of September begining of October. It begins to mold unless you have a mold resistant strain. You need quick variety if you cold winters, unless you have a greenhouse. So an opinion, clear skies would be best, though you get a longer season under cover.

Parameters beside harvest time, are all up to you: yield, potency, and flavor. Equatorial sativa and mostly sativa haze, develop later then the mountainous Indica with earlier harvest dates.

Putting out and guerilla locations can occur before your last frost date. The longer pot time is not bad, as the ground is cold and buckets and pots warm first and are quick to dry out. Avoid this with proper care, include allowing your plant proper bucket or pot size. 1 gallon will be good for a plant up to 1ft tall. You can prepare your site, before then. They say allowing your holes to be dug, filled with your soil mix, and sit for a month helps with the benifical microorganisms colonizing the holes. These microoganisms produce plant available nitrogen release with their activity.

They are very hardy plants, they will die at hard frost. Here are some indoor/outdoor with decent harvest dates.
Keep it organic.
http://bcseedking.com/in/outdoor-marijuana/