Muir
Muir: 50 days to harvest, 7-10 days to germinate, 8-12 inches between plants, pH 6.2-6.8, hardy in zones 2-11. Fruit runs to about 6-8 inches across, 4-6 inches tall. Give it full sun to partial shade (4-6+ hours) and 1-1.5 inches per week, consistent deep watering water. It will crop in a container.

Sowing
Direct seed or start indoors. Can be planted later in spring than most lettuce varieties. Excellent for summer succession planting.
Cultivation
- Sun
- Full sun to partial shade (4-6+ hours)
- Water
- 1-1.5 inches per week, consistent deep watering
- Soil
- Rich, well-drained soil with high organic content
- Soil pH
- 6.2-6.8
- Spacing
- 8-12 inches
- Height
- 6-12 inches
- Season
- Warm season annual
Appearance & flavour
- Colour
- Medium green outer leaves with pale yellow-green hearts
- Size
- 6-8 inches across, 4-6 inches tall
- Shape
- Dense, rounded butterhead with cupped leaves
- Flavour
- Sweet, buttery, and tender with delicate texture
In the kitchen
Gourmet salads, lettuce cups, sandwiches, fresh eating
Pests, disease & resistance
- Pests
- Aphids, thrips, leafminers, slugs
- Diseases
- Downy mildew, lettuce drop, tip burn
- Resistance
- Downy Mildew (EU) races 16-26, 28, 32 (High); Downy Mildew (US) races 5-9 (High); Lettuce Leaf Aphid Nasonovia ribisnigri (High); Lettuce Mosaic Virus (Intermediate); Tomato Bushy Stunt Virus (High)
Planting calendar by USDA zone
| Zone | Start indoors | Transplant | Direct sow | Harvest |
|---|---|---|---|---|
| 1 | — | — | June – July | July – September |
| 2 | — | — | May – July | July – September |
| 3 | — | — | May – June | July – October |
| 4 | — | — | April – June | July – October |
| 5 | — | — | April – May | June – November |
| 6 | — | — | April – May | June – November |
| 7 | — | — | March – May | May – November |
| 8 | — | — | March – April | May – December |
| 9 | — | — | February – March | April – December |
| 10 | — | — | January – March | March – December |
| 11 | — | — | January – February | February – December |
| 12 | — | — | January – February | February – December |
| 13 | — | — | January – February | February – December |
Companion planting
9 beneficial pairings indexed for this variety, 3 to avoid.
Avoid
Nutrition (per 100 g)
- Protein (g)
- 0.742
- Fat (g)
- 0.0738
- Carbohydrate (g)
- 3.37
- Vitamin K (µg)
- 20.5
- Vitamin B6 (mg)
- 0.0401
- Calcium (mg)
- 14.2
- Iron (mg)
- 0.0332
- Magnesium (mg)
- 6.31
- Phosphorus (mg)
- 19.2
- Potassium (mg)
- 139
- Zinc (mg)
- 0.173
Where to buy seed and equipment
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Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.
Grown Muir?
Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.
Similar varieties
Other lettuce with a comparable time to harvest, so a season that suits Muir suits these too.
- Lolla Rossa 50 days
- Red Leaf Lettuce 50 days
- Lollo Rosso 50 days
- Australian Yellow Leaf 50 days
- Giorgione 50 days
- Red Salad Bowl 50 days