• Lettuce - Manoa Semi - Head - Whitwam Organics
  • Lettuce - Manoa Semi - Head - Whitwam Organics
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Whitwam Organics

Lettuce- Manoa Semi-Head

Lettuce- Manoa Semi-Head

$5.99 USD
$5.99 USD
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Lettuce- Manoa Semi-Head

Lactuca sativa

 Manoa lettuce is classified as a semi-head variety, but the size and firmness of the head varies considerably with the temperature under which it is grown. ‘UH Manoa’ has medium-green to dark green “buttery” leaves. Its heads weigh up to 1 pound but are usually smaller. It is heat-tolerant, slow to bolt, and resistant to  tip-burn. Manoa is grown year-round in Hawaii, where it was developed, even at low elevations, although it will form larger heads, take longer to bolt, and have less tip-burn in cooler temperatures. It should be protected from heavy rains, which will bruise the soft leaves. I just can't say enough about this lettuce.  Be sure to check out our other SUMMER BALLER- Jericho Romaine

Days to germination 3-12 days
Days to maturity 55-65 days
Life cycle annual
Plant time/Harvest Plant seeds outdoors, protect from rain
Spacing 6-8 in.
Sun full sun in fall, winter and spring and part shade in summer
Soil temperature 35-85 degrees F.
Optimum soil P.H 6.1-7.5
Height 6-8 in.
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  • “All items arrived quickly and well packaged. I usually expect to have one or two live items out of a batch, but they are all thriving. I couldn’t be happier!”

    David L.
    August 2026

  • “My live plants were packed like they belonged in Ft Knox. 😂 They really were packed beautifully. Only one plant, a bee balm, is questionable but signs that it will recover are happening. All in all I am thrilled with my plants and seeds. Some of my coreopsis have already sprouted!”

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    May 2026

  • “I’ve ordered seeds from Whitwam Organics 3 or 4 times now. I love the simple packaging, clear planting guidelines, and variety they offer. Great germination rates!! The bare root plants I’ve ordered have come healthy, so healthy that the wild rabbits always approve of my menu upgrades! 😂🐰”

    Chanda B.
    August 2026
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