60 Days to maturity. Cucumis sativus. English Telegraph Cucumber Seeds. Non-GMO, annual, open-pollinated, heirloom, monoecious, slicing cucumber. Suitable for growing in fields, containers (with support), garden plots, raised beds, and greenhouses (with pollinators). Has some resistance to powdery mildew. This English heirloom cucumber was introduced around 1884 or before. English Telegraph produces a cucumber that averages 12-18 inches long and is nearly spineless. The flesh is crisp, non-bitter, mild, and just about one of the best cucumbers you will eat. ~700 seeds/oz.