Ordering will resume for Fedco Seeds when we release our 2018 catalog, in early December 2017.
Ordering will resume for Fedco Seeds when we release our 2018 catalog, in early December 2017.
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Marshall Romaine Lettuce OG

(67 days) We first discovered Marshall in the Territorial catalog. Now we have our own organic production. As Merlot to looseleafs so Marshall is to romaines, the standard for color intensity. Really deep dark red leaves with contrasting pink veins, radiating to a smidgen of green in the center. Tall upright 8" heads. Leaves smooth and succulent, crisp and chewy, lacking the bitterness usually associated with such coloration. Though sales could be higher, it is a staple in our mixes and we go through a lot. Stellar NOP-certified organic.
Item Discounted
Price
2877A: 1g for $1.50  
ordering closed, reopening in early December
2877B: 2g for $2.60  
ordering closed, reopening in early December
2877C: 4g for $4.40  
ordering closed, reopening in early December
2877D: 14g for $10.00  
ordering closed, reopening in early December
2877E: 28g for $18.00  
ordering closed, reopening in early December
2877K: 112g for $55.00  
ordering closed, reopening in early December

Additional Information

Lettuce

Lactuca sativa

All lettuce is open-pollinated.
1 gram packet sows 25 ft; 2 grams, 50 ft; 1 oz, 500–700 ft. Varieties average 875 seeds/1g pkt, or 1,750 seeds/2g packet.

Culture: May be started indoors in March and at regular intervals thereafter, or sowed outdoors as soon as ground can be worked. Many varieties won’t germinate in soil temperatures above 75° and most shut down above 80°. Where available, we present data here from a California germination experiment at 84°.

Hardy. All save icebergs tolerate heavy frost. Grow best in cool weather with ample moisture, many kinds suffer bottom rot and tipburn in heat; select summer varieties carefully. Use shade cloth to keep summer lettuce tender and sweet longer. Sesquiterpene lactones produced in the latex render lettuce bitter when it bolts.

Sow every 2 weeks for continuous supply. Lettuce will not head unless thinned frequently and ruthlessly to final distance of 1'. Heavy nitrogen feeders.

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Minimum germination soil temperature 35°, optimal range 40–80°, optimal temperatures 70–75°. Emergence takes 15 days at 41°, 7 days at 50°, 3 days at 68°, 99% normal seedlings at 77° but only 12% normal at 86°.

Days to maturity are from direct seeding.

Diseases:

  • BOR: Bottom Rot
  • DM: Downy Mildew
  • LMV: Lettuce Mosaic Virus
  • PM: Powdery Mildew
  • SC: Sclerotinia
  • TB: Tipburn
  • X: Xanthemonas

Pest: Aster Leafhopper (vector for Aster Yellows disease)
Cultural controls: control perennial broadleaf weeds near lettuce plantings, plow lettuce fields immediately after harvest.

Pest: Slug
Cultural controls: avoid mulch or nearby grassy areas.
Material: Sluggo

Disease: Bottom Rot
Cultural controls: rotate with grass-family green manures, plant in well-drained soil or on raised beds, more upright varieties escape infection.

Diseases: Downy Mildew, Grey Mold, White Mold
Cultural controls: rotation, reduce duration of leaf wetness, plant parallel to prevailing winds, use wide spacing, control weeds, use well-drained fields in spring and fall.
Material: Actinovate