When is the best time to go to Beijing Botanical Garden? What flowers are there?

Tongzhou takes Chang 'an Street, then goes to West Fifth Ring Road and Bajiao Bridge and goes north. It's about ten minutes' drive (if there is no traffic jam) until you see Xiangquan Bridge. I don't know the route when driving. Then you can look at the road sign. Whoever has more people and cars will be on whose side. This is probably the route with the least turns. If you want fewer traffic lights, go directly from Sihui to the Fourth Ring Road and take the northern line! In my opinion, the best time to go to the botanical garden is in the middle and late April, but the road conditions must be very poor at that time, so we can't say that we can't walk. Since then, there have been magnolia, apricot blossom, cherry blossom, peach blossom, tulip, peach blossom, and many other names I can't name.