Hey everyone!

I want to start learning the cello, but im not sure if its too late for me to start or not...

Im over 12 years old, ive been playing guitar for 4 years and can read the bass clef and know of a teacher near where i live...

Should i go for it?

YES.
If you were 50 years old and wanted to do it I would say yes.
There are no age limits to starting or stopping.

Let me rephrase - NO, it's not too late. Yes, you should go for it.
I answered your final question in the body, but on highlights it looks like I'm telling you it's too late, it's never too late (and that applies to pretty much everything).

Go for it. I started when I was 12, played for six years in orchestra and an all city junior symphony until I graduated from high school. I didn't play cello again for 45 years then took it up again in 2004. I am still playing at the age of 68.
Bob

Thanks everyone!!

im going to do it!

omg no!!! I started cello at 15! i had music knowledge so that helped. but i played the flute so reading bass was a challenge...after taking private lessons i was going from twinkle twinkle little star from the elgar concerto in a matter of months...But i also practice alot of hours a day.

it's never too late
The cello is my first instrument and started playing it when I turned 40.

mark

My cello teacher loaned me this book right after I started playing cello again after 45 years and it really encouraged me. I would recommend it. This is a true story of a man that started playing cello when he was 40.
Here is a link to amazon.com where you can see it:
http://www.amazon.com/Never-Too-Late-Musical-Story/dp/0201567636/ref=sr_1_1?ie=UTF8&s=books&qid=1241752730&sr=1-1

Im over 12 years old...Should i go for it?

I suppose that depends whether you can get leave from the retirement home to attend your lessons. In what condition is your walker? Have you consulted your grandchildren about this decision?

Piano was my first instrument. I started cello in grade nine when I was 14. At the end of grade ten I started private lessons. I'm now in grade 11 and doing grade 4 AMEB.

It is NEVER too late to start!

The grandmother of a friend of mine has recently started to learn the clarinet, and she's in her 70's! Good on her I say, and anyone like her.

"On" is NOT an all-purpose preposition. That should be "good FOR her".

I started playing oboe when I was 12.

i started when i was twelve, and i caught up with everyone who had started when they were younger really quick because i practise a lot. i think it is actually a perfect age for beginning, because you are old enough to work hard. you can already read bass clef so probably you'll be more suited to it than a lot of people. go for it- good luck.

also, Scotch, there's no need to be rude to people.

<Added>

and where i come from everyone says good ON you.

I want to start learning the cello, but im not sure if its too late for me to start or not...

It is always worth trying. You never know whether or not you have it, unless you try.

I ... can read the bass clef

It is always good to know in advance what to expect. You know the bass clef - great. If you also know the treble clef, it is better. Be prepared to familiarize yourself also with the tenor clef. Cello music uses all these three clefs.

Two items - Scotch and staring 'late'.

one - Scotch 'good on her' is a common coloquial saying in other English speaking countries.

two - It doesn't matter when you start. I know of a Physics professsor from a major University who started learning music and French Horn after he acheived tenure. 18 months later he left the university for a principal Horn position in a major symphony orchestra. That is amazing.