There are many kinds of precious flowers planted in the greenhouse, including Japanese begonia, Chinese rose, golden bell, Datura stramonium, Petunia, Impatiens balsamina, Bougainvillea, Ivy, Gesneriaceae, Solanum lyratum, Perilla frutescens and Rhododendron. 1 1 There are about 400 varieties. Not only can you see bright flowers in four seasons, but you can also see invisible flowers this season.