les ▁XIV ▁John ▁of ▁Sweden ), ▁also ▁known ▁as ▁Jean ▁Bapt iste ▁Bern ad otte . ▁Bern ad otte ▁transformed ▁the ▁area ▁into ▁an ▁English ▁park . ▁In ▁ 1 8 1 9 , ▁the ▁architect ▁Fred rik ▁Bl om ▁constructed ▁a ▁royal ▁castle ▁linked ▁to ▁the ▁area ▁known ▁as ▁" R os end als ▁Tr äd g år d ". ▁At ▁the ▁same ▁time ▁a ▁winter ▁garden ▁was ▁also ▁built , ▁creating ▁an ▁opportunity ▁to ▁cultiv ate ▁tropical ▁plants ▁even ▁during ▁winter time . ▁In ▁ 1 8 4 8 ▁the ▁Swedish ▁king ▁Oscar ▁I ▁built ▁an ▁or ang ery , ▁where ▁ex otic ▁plants ▁such ▁as ▁pal ms ▁could ▁be ▁expl ored . ▁The ▁one ▁person ▁that ▁has ▁been ▁most ▁influ ential ▁in ▁the ▁development ▁of ▁Ros end als ▁Tr äd g år d ▁is ▁probably ▁Queen ▁Josef ina . ▁Queen ▁Josef ina ▁had ▁a ▁great ▁interest ▁in ▁garden ing ▁and ▁made ▁it ▁possible ▁for ▁the ▁development ▁to ▁take ▁place ▁by ▁establish ing ▁a ▁number ▁of ▁plant ations ▁and ▁green h ouses . ▁In ▁ 1 8 6 1 , ▁Queen ▁Josef ina ▁also ▁collabor ated ▁with ▁the ▁Swedish ▁Garden ing ▁Society , ▁something ▁that ▁made ▁it ▁possible ▁to ▁start ▁a ▁garden ing - ac ade my ▁in ▁the ▁area . ▁T ogether ▁they ▁reform ed ▁and ▁struct ured ▁the ▁garden ▁and ▁its ▁administration ▁after ▁their ▁ideal , ▁the ▁Royal ▁H ort icult ural ▁Society ▁in ▁London . ▁All ▁the ▁work ▁that ▁was ▁implemented ▁during ▁Queen ▁Josef ina ' s ▁lifetime