1 litre sized pot.  Coreopsis lanceolata Mango Punch provides flowers with a wonderful blend of soft peach-orange held 30-45cm above bright green lance shaped leaves.  Responds well to regular division each spring and likes a sunny, well-drained spot in the garden.  Keep dead-heading to prolong the display.  Looks great planted next to Solidago 'Golden Baby' or Eupatorium rugosum 'Chocolate'.