▁and ▁shr ub ▁species , ▁p ines ▁and ▁spr u ces , ▁turning ▁the ▁garden ▁into ▁a ▁wonderful ▁park . ▁ ▁Du h te v ▁period ▁( 1 9 3 4 – 1 9 4 4 ) ▁The ▁Bulgar ian ▁gard ener ▁and ▁special ist ▁Georg i ▁Du h te v ▁became ▁the ▁manager ▁of ▁the ▁Gard ens ▁and ▁Park s ▁Service ▁in ▁ 1 9 3 4 . ▁During ▁his ▁period , ▁the ▁old ▁Ros arium ▁was ▁extended ▁to ▁em brace ▁ 7 , 0 0 0 ▁m ² ▁with ▁over ▁ 1 , 4 0 0 ▁new ▁cultiv ated ▁rose ▁species ▁being ▁plant ed ▁by ▁him . ▁The ▁Japanese ▁Cor ner ▁was ▁created ▁in ▁ 1 9 4 0 ▁above ▁the ▁Fish ▁Lake ▁towards ▁Ts ar ig rad ▁Road . ▁Pl ants ▁sent ▁by ▁the ▁Japanese ▁minister ▁pl en ip ot enti ary ▁were ▁used ▁to ▁ar range ▁it . ▁These ▁plants ▁represented ▁the ▁national ▁fl ora ▁of ▁Japan ▁and ▁were ▁a ▁gift ▁and ▁a ▁sign ▁of ▁friendship ▁between ▁the ▁Japanese ▁and ▁Bulgar ian ▁people . ▁ ▁Ar ound ▁ 1 9 4 2 ▁Bor is ova ▁grad ina ▁emb rac ed ▁an ▁area ▁of ▁ 9 0 , 5 0 0 ▁m ², ▁ 6 8 , 6 0 0 ▁m ² ▁of ▁which ▁planned ▁and ▁ 4 , 4 0 0 ▁m ² ▁not , ▁the ▁remainder ▁of ▁ 1 7 , 3 5 0 ▁m ² ▁being ▁built ▁up ▁and ▁including ▁the ▁Summer ▁Sw imming ▁Bath , ▁the