Is it a good time to visit shanghai botanical garden or flower port at Nanhui in mid november 2017?

Well, you can visit SH Botanical Garden or Flower Port at that time. There are different flowers in different seasons. You can enjoy the greenhouse exhibition at that time.
To Botanical Garden: You may walk about 300 meters westwards to People’s Square Metro Station and take metro line 1 to Caobao Road Station. Then you may transfer metro line 12 to Longcao Road Station, Exit 2. Afterwards, you may walk about 100 meters to Longwu Road Longcao Road Bus Stop and take bus no.178, no.824, no.956, no.770 or no.720 to Wulong Road South Longshui Road Bus Stop. Upon arrival, you may walk about 90 meters ahead to the destination.
To Disneyland: You may walk to People’s Square Metro Station and take metro line 8 to Oriental Sports Center Station. Then you can transfer metro line 11 to Disneyland Station, Exit 2. When you get out of the station, the ticket office is just in front of you.

Your answer is really helpfull..

What's more recomended to see between jinmao tower, capital finance building, and pearl tv tower?

What time the best view in day or night?

Well, Jinmao Tower is only about 850 meters away from the Oriental Pearl Tower. Along the road, there is a plaza, so you can taste some foods and shop there.
You are advised to visit that at night. The light will be quite beautiful. You can also enjoy the night scenery of Huangpu River.