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Lactuca sativa 'Grand Rapids'

Lactuca sativa Grand Rapids
Lettuce

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Cutting lettuce of the Oak Leaf type, characterized by rapid growth and slightly wrinkled dark green leaves. It is a delicious, crisp and tender salad that can be sown from February to August for a harvest approximately 6 to 8 weeks later. It is enjoyed in salads, appetizers, sandwiches or as a side dish.
Ease of cultivation
Beginner
Height at maturity
30 cm
Spread at maturity
30 cm
Soil moisture
Damp soil
Germination time (days)
10 days
Sowing method
Direct sowing, Sowing under cover
Sowing period February to July
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Harvest time April to November
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Description

Lettuce 'Grand Rapids' is a cutting lettuce of the Green Oak Leaf type. It is a tender and crunchy salad, with delicately crinkled leaves gathered in a fan shape. The sowing period extends from February to April under cover or from March to August in open ground, for a harvest 6 to 8 weeks later. Resistant to cold, it can be grown in autumn.

If lettuce is one of the most popular vegetables (4.2 kilos per person per year), it is appreciated for its freshness, crunchiness, as well as its taste and nutritional qualities. It can be consumed raw, in salads, but also cooked, to accompany peas, for example.

The Lettuce is a leaf vegetable par excellence, an annual plant belonging to the large Asteraceae family. Its Latin name, Lactuca sativa, refers both to the white sap (lactuca) that flows when it is cut and to the fact that it is cultivated (sativa).

It is an essential vegetable in any respectable vegetable garden and there are so many varieties that it can be grown almost all year round. Cutting lettuces do not form heads and are harvested as needed, as they have the ability to regrow after each harvest.

Lettuce cultivation is easy as long as the cultivation calendar for each variety is respected. Its growth is fast and it thrives in any soil, provided it is rich and remains moist.

Harvest: It is done with a knife, by taking the leaves from the outer edge of the plant, which will continue to grow and produce new leaves.

Storage: Lettuce can be stored for a few days in the refrigerator, but to enjoy its freshness to the fullest, we recommend consuming it immediately after harvesting.

Gardener's tip: During hot summer weather, lettuces exposed to full sun tend to wilt. To prevent this, consider protecting them from intense rays by using upside-down crates. In our garden, summer lettuces are not grown in rows, but scattered everywhere: at the base of climbing beans, in the middle of cucumbers and squashes, whose foliage provides beneficial shade.

Gardening tip: A true nightmare for gardeners, slugs and snails love lettuce leaves. When the hunt is on, we are ready to do anything to repel or eliminate them. A solution exists: we recommend using an anti-slug product composed of ferric phosphate known as Ferramol. Unlike metaldehyde-based slug baits, which are harmful to wildlife and polluting, Ferramol is natural, non-toxic, and very effective as long as you remember to "treat" your plot a few days before sowing.

Harvest

Harvest time April to November
Type of vegetable Leaf vegetable
Vegetable colour green
Size of vegetable Medium
Interest Flavour, Productive
Use Table, Cooking

Plant habit

Height at maturity 30 cm
Spread at maturity 30 cm
Growth rate fast

Foliage

Foliage persistence Annual
Foliage colour green

Botanical data

Genus

Lactuca

Species

sativa

Cultivar

Grand Rapids

Family

Asteraceae

Other common names

Lettuce

Origin

Cultivar or hybrid

Annual / Perennial

Annual

Planting and care

Sowing:

The germination of Oak Leaf Lettuce occurs at a temperature between 15 and 22°C (59 and 71.6°F) and takes 7 to 14 days.

Sow under cover (cold greenhouse) from February to April or directly in place from March to August, for a harvest 6 to 8 weeks later.

On loosened and well-prepared soil, make furrows spaced 30cm (12in) apart, with a depth of 0.5cm. Sow in rows, spacing the seeds 4cm (2in) apart and cover. After emergence, when the plants are well developed, thin them out to leave one plant every 30cm (12in).

If your vegetable garden is often prey to slugs and snails, we recommend sowing under cover, in small clumps, and planting them in the garden when the plants are well developed.

Cultivation:

Lettuce is not a very demanding vegetable, but it still requires humus-bearing soil, otherwise it tends to bolt prematurely. It is advisable to apply a moderate amount of mature compost, preferably in autumn, by raking it in to a depth of 5cm (2in), after loosening the soil, as is done for all vegetable crops. It prefers slightly acidic to neutral soils (pH between 5.5 and 7.5).

During cultivation, remember that Lettuce appreciates moist soil and remember to water it regularly.

Lettuce is a good companion, it is a crop that can easily be interplanted with other slower-growing vegetables such as beans, tomatoes, cucumbers... Just avoid planting it next to corn.

 

Seedlings

Sowing period February to July
Sowing method Direct sowing, Sowing under cover
Germination time (days) 10 days

Care

Soil moisture Wet
Disease resistance Good
Pruning No pruning necessary

Intended location

Type of use Vegetable garden
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Beginner
Soil Fertile, well-drained.
Exposure Sun, Partial shade
Soil pH Any
Soil type Silty-loamy (rich and light), 192

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