Euphorbia amygdaloides ‘Ruby Glow’ – An evergreen Euphorbia with rich reddish-purple late summer foliage that makes an attractive contrast plant in containers, especially when paired with gold-leaved Heuchera. The new growth is intensely red, accented by March to May greenish-yellow flower bracts. As with all Euphorbia, cut the faded flower stalks down to new shoots. Grows 12-18″ tall and 18″ wide. Hardy to zone 7.
Euphorbia x martinii ‘Ascot Rainbow’ – Amazing variegated foliage of greenish-blue with heavy accents of gold and lime green – this is infused with reddish-pink during the cooler months. The March to May blooms are variegated bracts on this drought tolerant perennial. Care should be taken when pruning Euphorbia, as the sap is a skin irritant. Grows 20″ tall and wide. Hardy to zone 7.
Euphorbia characias ‘Tasmanian Tiger’ – A highly variegated form with green foliage heavily accented with creamy-gold margins. This is a great accent plant for containers, but unfortunately has proven less winter hardy than other variegated Euphorbias. That said, it still remains popular for its spring (variegated) bloom bracts with contrasting green eye. Grows 18-30″ tall and 18-24″ wide. Zone 8.
Euphorbia x amygdaloides ‘Helena’s Blush’ (syn. Inneuphhel’) – This sport of Euphorbia ‘Efanthia’ is technically a cross of Euphorbia x martinii and Euphorbia amygdaloides. It is a hardy evergreen perennial that bears brightly variegated foliage of deep green with pale yellow margins, accented by reddish new growth. The spring bracts are also variegated. Grows 20″ tall and wide, and is hardy to zone 5.
Euphorbia ‘Blackbird’ (syn. ‘Nothowlee’) – The dark purple to dusky plum foliage of ‘Blackbird’ is the perfect foil for ornamental grasses such as Carex ‘Evergold’ or Hakonechloa macra ‘Aureola’. This deer-resistant sport of ‘Redwing’ is quite bushy and has darker foliage when given more sun. The chartreuse bracts are borne in spring on red stems. Grows 18-20″ tall and wide. Hardy to zone 7.