9cm pot.  Helenium Butterpat is a hardy perennial that has bright buttery-yellow blooms at the top of tall, strong stems that reach well over 1 m high.  Medium green coloured foliage.  Loved by bees and beneficial insects.  Loves a sunny position in well-drained, moist soil.  Winter dormant.  Looks great partnered with tall blue or purple toned salvias.