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Lettuce Iceberg 4
Not to be confused with the "Iceberg Lettuce" found in supermarkets. Iceburg 4 has large slightly open hearts with crisp leaves tinged red on the edge.
Sow spring and early summer.
Lettuce is one of the staple ingredients in a crispy, fresh summer salad. So what could be better than growing your very own lettuce to add to your tasty salads.
Product Part Number: 12615
When to sow
When to Sow Iceberg 4 Seeds
End of February to June
Sowings begin in February under glass at 15°C followed by outdoor sowings under cloches until late autumn. Sowings for overwinter production uses cloches and glasshouse. Germination difficulties may be experienced in July and August as lettuce seed will go into dormancy if sown in very hot weather.
Where to Sow
Sowings can be made underglass, sow seeds into pots or trays of seed sowing compost at a temperature of 15-20C and lightly cover seeds with sprinkling of vermiculite or compost. Alternatively sow seeds from April thinly along rows 1.5cm (1/2in) deep and 30cm (12in) apart direct in the vegetable plot.
What to do next
Sowings made under glass can be pricked out into individual pots or module trays and grown on until ready to harden off and plant out into the vegetable plot 30cm (12in) apart between the plants and the rows. Seedlings sown direct outside can be thinned once large enough to handle to 30cm (12in) apart. Thinnings can also be transplanted into other rows, watered in well during hot dry spells.
10-12 weeks after sowing.
Regular watering around the roots and not on the foliage is essential, especially 7-10 days before maturity.
A good source of antioxidants such as beta-carotene, lutein and vitamin C as well as vitamin K.
Lettuces mature quickly, butterheads at about 10 weeks and crisphead and cos types at around 14 weeks. They will not stand for more than 5-7 days once mature before running to seed, so successful successional sowing or the use of the "cut and come again" types is required.