SWEET CORN - GLASS GEM

Organic Sweet corn Glass Gem

          10 Seeds Pack    

Glass Gem corn is a smaller heirloom variety compared to commercial corn, typically measuring 5 to 20 centimetres in length with a straight, cylindrical shape. The cobs are wrapped in multiple layers of semi-rough husks that start out pliable and green when young, gradually darkening and drying to a papery, brown, and brittle texture as they mature. Once the husks are peeled back, the narrow cob is revealed, adorned with plump, oval-to-oblong kernels. 

Each ear of Glass Gem corn is unique, displaying a stunning array of translucent colours such as emerald green, ruby red, dark blue, amethyst, pink, white, yellow, and bright green. The kernels have a hard outer shell that protects their softer interior, giving them a firm, chewy texture. Their opalescent, jewel-like appearance is a hallmark of this variety, along with their high starch content.

      PLANTING&GROWING

Sweetcorn has shallow roots, making wind protection and soil moisture retention essential for healthy growth. With heights ranging from 75 to 170 cm (30 to 65 in) and an average spread of 45 cm (18 in) per plant, care should be taken to avoid shading nearby vegetables.

To germinate successfully, sweetcorn seeds require a minimum soil temperature of 10°C (50°F). Seeds can be started indoors in spring or sown directly outdoors from May onwards. Sweetcorn thrives in a long, warm season, needing 70 to 110 frost-free days after planting, with ideal growing temperatures between 16 and 35°C (61°F to 95°F). Germination typically takes 10 to 14 days.

When transplanting sweetcorn outdoors in May, use a trowel to plant seedlings 25 to 30 cm (10 to 12 in) deep with 60 cm (24 in) between rows, forming a block for better pollination. For direct sowing in late spring or early summer, wait until the soil temperature exceeds 15°C (59°F). Create 2.5 cm (1 in) deep holes with a dibber, sowing two to three seeds every 25 to 30 cm (10 to 12 in) with 60 cm (24 in) spacing between rows. Cover with soil, water thoroughly, and thin seedlings to the strongest one when they reach 2 cm (1 in) in height.

For optimal growth, plant sweetcorn after nitrogen-fixing crops like clover, beans, or peas. Following a 3- or 4-year crop rotation plan is recommended to maintain soil health and prevent nutrient depletion.