Hardy water lilies in dwarf varieties are best for indoor growing. Some recommended varieties include: 'Aurora', with orange-apricot flowers, suitable for growing in 12 to 24 inches of water; 'Denver', a yellow flower that grows in as little as six inches of water; 'Fabiola', which grows in six to 10 inches of water, with bubblegum pink flowers; or 'Hermine', white flowers, which grows in six to 24 inches of water.