Hello everybody, last summer (july 2017) we bought a Baby Sequoia (Jonsteen company) in our holidays in the USA. Back in Germany we planted it in a flower pot. We kept it inside in front of a window. In autumn it started to look not so well. The needles looked dry and thin and started to change their color into brown. So, we put it outside in winter. But the color change increased. It's over zero degrees outside. We water it two times a week. What can I do to make it look better again?