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Plato II Romaine Lettuce - Organic

seeds
Choose an item size to add to your cart.
$4.00
Item: 2866-A
$7.50
Item: 2866-B
$14.00
Item: 2866-C
$24.00
Item: 2866-D
$58.00
Item: 2866-E
Lactuca sativa
(65 days) Open pollinated.

A lettuce fit for a philosopher-king, Plato sets a high standard for sweet taste in a romaine, holding its quality well into summer without bitterness, bolting or any tendency to tipburn. Lettuce aficionado Morton also found it more resistant to DM and SC than any of the other green romaines in his plot. Attractive 10" heads stay fairly open with dark green slightly ruffled heavily veined leaves. 

Supplier Transparency:
① Small seed farmers including Fedco staff
ships year-round
Quick Details
Hybrid Status
open pollinated
Days to Maturity
65 days
Lifecycle
annual
Color
dark green
Compare
Compare with other Romaine Lettuce
Variety Product Type Hybrid Status Days to Maturity Lifecycle Color
Winter Density seeds open pollinated 60 days annual dark green
Pandero
Organic 		seeds open pollinated 44 days baby, 63 days mature annual deep purple
Blushed Butter Cos
Organic 		seeds open pollinated 49 days annual red-tinged green
Jadeite
Organic 		seeds open pollinated 50 days annual apple green
Mayan Jaguar
Organic 		seeds open pollinated 51 days annual maroon-speckled green
Forellenschluss Routine seeds open pollinated 56 days annual red-speckled deep green
Forellenschluss Ritzy
Organic 		seeds open pollinated 56 days annual red-speckled deep green
Jericho
Organic 		seeds open pollinated 60 days annual light green
Better Devil
Organic 		seeds open pollinated 60 days annual purple-tinged green
Rouge d’Hiver seeds open pollinated 65 days annual bronzed green
Plato II
Organic 		seeds open pollinated 65 days annual dark green
Zeb
Organic 		seeds open pollinated 65 days annual green
Olga
Organic 		seeds open pollinated 66 days annual lime green
Marshall
Organic 		seeds open pollinated 67 days annual dark red
Parris Island Cos seeds open pollinated 68 days annual green
Crisp Mint
Organic 		seeds open pollinated 70 days annual dark green
Winter Wonderland
Organic 		seeds open pollinated 70 days annual dark green
Additional Information

Romaine

Also called Cos. Large crisp-stemmed leaves wrap into a tall head with buttery but snapping blanched centers. Great performance in cold and heat.

Lettuce

  • 700–1100 seeds/g.
  • Days to maturity are from emergence after direct sowing; for transplants, subtract 20 days.

Culture: Direct seed outdoors as soon as ground can be worked and repeat every 2 weeks for continuous supply. Or start indoors in March and at regular intervals thereafter for early transplanted successions. Optimal germination temperature range 40–70° though many varieties won’t germinate in soil temps above 75° and most shut down above 80°. Thin sowings frequently and ruthlessly to a final distance of 1' for full heads. Heavy nitrogen feeders.

Hardy. All save icebergs tolerate heavy frost. Fall and overwintered harvests are becoming standard practice. For summer harvest, select varieties carefully: bolting, bottom rot and tipburn are problems if a variety can’t take the heat! Using shade cloth can keep lettuce tender and sweet longer into summer. Sesquiterpene lactones produced in the latex render lettuce bitter when it bolts.

Saving Seed: Saving lettuce seed is easy! Leave spring-planted lettuce heads to bolt. Flowers will become white tufted seeds. Once dry on stalk, rub seeds off the plant into a paper bag. To ensure true-to-type seed, separate lettuce varieties by 10 feet.

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.

Major 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 controls: MilStop

Germination Testing

For the latest results of our germination tests, please see the germination page.

Our Seeds are Non-GMO

Non GMO

All of our seeds are non-GMO, and free of neonicotinoids and fungicides. Fedco is one of the original companies to sign the Safe Seed Pledge.

Shipping

From early May through mid-December, items shipping from our garden seeds warehouse ship twice a week, usually Tuesday and Thursday. For quickest turnaround time order online by noon Monday or Wednesday.