Cool Experimental Rose Garden Portland Or References. The garden cares for over 10,000 plants of. Web more than 10,000 individual rose bushes bloom in the international rose test garden (irtg) from late may through october, representing over 610 different rose varieties.
It’s primary purpose is as a testing ground for new rose varieties and it is the oldest rose testing program of it’s kind in the united states. The best time to visit is when the roses are blooming, from late may through october. You can reach us by email at waparkroses@gmail.com or by postal mail at:
