Carmona

Carmona Butterhead Lettuce OG

(50 days) Also known as Carmona Red or Carmona Red Tip. Frank Morton brought this Canadian heirloom red butterhead back from near extinction. Lush dark green butterhead base is fully blushed carmine and pebbled with bronze and brown. Stunning, but the taste is what will keep you coming back. Outer leaves are sweet, juicy and buttery while the well-blanched interior is tender and melting. Heads mature slowly and tighten just after color-mate Pirat. Broad 16" plants mound to a 6" center head. Good disease resistance and of market-grower quality, Carmona showed long field holding and excellent bolt resistance again in tortuous 2018. We observed one in six plants is more blond and less red, but wonderful nonetheless.


2809 Carmona OG
Item Discounted
Price
A: 1g for $3.00  
B: 4g for $9.60  
C: 14g for $22.00  
D: 28g for $40.00  
E: 112g for $140.00   ($133.00)
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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.

Minimum germination soil temperature 35°, optimal range 40–80°.

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