I stumbled upon a video from Mr EastCoastMan where he shows how to grow an avocado plant and found out that the guy behind the video lives in Canada. Canada is even colder then the Netherlands, so growing a plant like he did shouldn't be a problem.
I bought two avocados which were produced without pesticides etc., biological avocados as they call them here. I peeled of the shell from one avocado, pinned it with two forks aside of the seed and placed it in a glass of water on the 5th of December 2015.
I watched it once a week, I refilled the glass with water every week but nothing really exciting happened but a month later, on 5th of January I saw a crack in the seed. Its a little difficult the see but in the center of the bottom there is a crack and it splitting open the seed almost in half.
I am excited about the process and I will keep you posted.
Update on January 13th: Its been 8 days since my last post and today I took a picture where you can see the new root coming out very clear. I picked another glass and refreshed the water completely.
Update on January 15th: I am going to refresh the water more often, look how hard it has grown in 2 days. Before I refreshed the water for the first time after a month I only refilled the glas with extra water.
Update on January 18th: Three days later and now there is rapid growth of the root system. I haven't refreshed the water or did anything yet.
Update on January 20th: I wasn't planning on taking a picture of the growing seed but here it is anyway, my avocado tree in progress is companied by a peace lily flower. I couldn't just throw it away just yet. And you can also see the growth of the root.
Update n Februari 20th: Yes Yes Yes, there is some growth showing within the crack, finally. Dont pay attention to the spiderplant leaf, I cut it by accident and decided to let it live further in water. In the crack in the seed you see some green coming up. But grows slowly but its there.
The little tree is also getting really tal in a short amount of time. Within 10 days it grew 10 cm or 4inch. At the moment the stem is 17 cm or 6.69inch tall. Its tall enough to repot it into some soil but I will wait untill the leaves are bigger and bright.