How to maintain a high-impact landscape with minimal garden effortIntegrating the Euphorbia polychroma 'Bonfire' cultivar allows gardeners to maintain a high-impact landscape with minimal maintenance. Landscape Application and Safety PrecautionsDue to their structure, compact euphorbias are effective for defining garden paths and borders. The white milky sap (latex) is aggressive and can cause severe burning and rashes resembling chemical burns upon skin contact. Its white sap is very aggressive." Most garden varieties, including the polychroma type, are highly winter-hardy and generally do not require additional covering in temperate climates.