Find a better potting soil than the sludge you are trying so hard to make work.

Is it a new plant?

a few months old

I had picked the leaves as they were bad.

I will try

Thanks

Sometimes some of them just rot. Don't know why. One time I bought a bag of them at Walmart, and half of them were rotted.

rotted before plantation?

1 ) and watering it everyday,

do you water it even it is moist/wet?

should I water it if it is still moist/wet?

2) as the plant is so small, should i use very little amount of soil? it would get dry quickly and thus the plant would need fresh water supply quickly again, i thought it would be good. Is it a good idea?

Put it in a pot that is about 5" - 6" deep - filled with soil - that should cover the root. Leave all of the "top" out in the air. The roots do not need to be wet - in fact, it probably wouldn't hurt this little bugger to dry out just a bit. Is that dark root slimy? That means too wet. The leaves do not need to be watered. water it so that the water runs out the drain hole. If it's in the shade and not very hot out, it shouldn't need water every day. Also, depending on where you are - it may be a bit early for strawberries to break dormancy. That looks like fresh growth , so maybe it has.

I did this.

In fact, this is my first year at growing a plant and i didn't let them for dormancy :)

I gave water after plantation

and plan to water a few days later

when the mix starts to look dry.

Is there a drain hole on the bottom of that pot? There must be a hole in the bottom so that the excess water drains out.

Yes, drain holes are a must. May I ask where you got it? Sorry, but it looks like a piece off of an old crown several years old. New young strawberry plants have nice stringy roots, and not that brown hard wood-like piece. It still could live, but you might not get many berries.

I had bought from different places so i don't remember exactly.

But, when i got them they had 4 or 5 leaves and some of them had 1 or 2 flowers, etc.

how can someone understand the old or young plant?

Is it easy to distinguish?

If it is small, both as a crown and the leaves, does it mean it is young? or what? thanks.

A young/new plant looks like this. In my experience a strawberry plant only bears well for a couple of years or so, needs to be replaced. I had some for 3 or 4 years, but the root/crown system looked like yours. It gets woody, and brittle.

I have ordered new bare root plants.

I hope they are young.

I think they should be.

Sounds like a good decision.