Philodendron scandens 'Brasil' Herzblattpflanze in Grn Gelb Der Palmenmann Vita Grow Light Bulb White Wide Gunnera manicata in all it's glory. My son Soren is 6'2 and this giant dwarfs him. Gunnera is one of the largest herbaceous plants on earth and can grow in clumps over Cats are inquisitive animals, and anything unfamiliar catches their interest. The feline might have great survival instincts, but it's better to still pet proof your home, especially when planting hydrangeas in your garden.