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High Mowing Organic Seeds
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Organic Non-GMO Summer Squash Seeds::Organic Non-GMO Zucchini::Organic Midnight Lightning Zucchini

Organic Midnight Lightning Zucchini  Organic Non-GMO Midnight Lightning Zucchini - Open-Pollinated

Extra long and slender zucchini with dark green, almost-black coloring. Single stemmed plants are sturdy and stems have few spines. Plants produce quickly and have good field resistance to disease. The first variety developed on our organic seed farm in Wolcott, Vermont and released through the Open Source Seed Initiative. Open Source Seed • Powdery Mildew tolerant • Harvest at 7-8”. (Cucurbita pepo)

Days to maturity: 55 days

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Learn more about the Open Source Seed Initiative Pledge and this variety.
SKU Description Our price
2907A 10 Seeds $3.95
2907B 50 Seeds $6.75
2907C 250 Seeds $11.00
2907M001 1 M $36.00
2907M005 5 M $139.00 $27.80/M
2907M025 25 M Call For Availability $559.00 $22.36/M

Unit Size

Organic Zucchini Comparisons

Item Code Variety Name Heirloom Disease Resistance DTM Color Shape Size to Harvest Standout Characteristics
2909 Desert F1   PM, CMV, ZYMV, WMV, PRSV 50 dark green long 6-8" excellent disease resistance, especially to PM; easy to harvest, beautiful uniform dark green speckled fruit
2900 Dark Green     50 dark green long 6-8" good yielder, straight and marketable fruits, best suited to home gardens
2892 Dunja F1   PM, ZYMV, WMV, PRSV 50 dark green long 6-8" high yielding, straight and slightly ridged, glossy skin, spineless, compact plants
2915 Goldy F1     50 yellow long 6-8" high yielding, good percentage of marketable fruit, less prone to greening than Gold Rush, long and slender, open habit, few spines
2894 Cha-Ching F1   DM tolerant 52 medium-green long 6-8" productive, glossy with light green speckles, slightly tapered, small blossom, open plant habit
2895 Costata Romanesco   54 grey-green long, ribbed 6" Italian variety, excellent taste, nutty flavor, exceptional texture, slender skin, prominent ribbing
2911 Dark Star     55 dark green long 6-8" improved OP variety rivals hybrids for productivity; drought tolerant, vigorous plants with glossy fruits
2897 Dario F1   PM 55 green striping long, slightly ribbed 6-7" striking stripes, upright and open plant habit, single stemmed, slender fruit, sweeter than typical cocozelle
2907 Midnight Lightning     55 green-black long 6-8" HMS exclusive, extra long and slender, single stemmed, sturdy plants, few spines
2896 Cocozelle     58 green striping long, slightly ribbed 6-8" Italian variety, productive, attractive, striping is halfway between Costata Romanesco and Dario F1, nutty and flavorful, straight, evenly-shaped, mostly single-stemmed

Disease Resistance Key:
PM Powdery Mildew
ZYMV Zucchini Yellow Mosaic Virus
WMV Watermelon Mosaic Virus
PRSV Papaya Ringspot Virus
DM Downy Mildew

Organic Summer Squash - Growing and Seed Saving Info

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Types of  Summer Squash
Summer squashes (Cucurbita pepo) are warm-season annuals in the Cucurbitiacea family, which includes cucumbers, melons, winter squash, and gourds. Commonly grown types include:
  • Zucchini
  • Crookneck
  • Specialty types can be scalloped, round or pale green.
Soil  and Nutrient Requirements
Plants need loose, fertile, well drained soil with plenty of nitrogen and a pH 5.8-6.8. Fertilize seedlings with fish emulsion if leaves yellow.
Full Sun
Seeding Depth
Seeding Rate
Direct seeding: 2-3 seeds every 12-24", thin to 1 plant
Plant Spacing
Row Spacing
When to Sow
Days to maturity are from direct seeding, subtract 2 weeks if transplanting. Direct seed as soon as chance of all frost has passed or start transplants 3-4 weeks before planting date. Optimum soil temperature for germination is about 85ºF and little or no germination occurs below 60ºF. Harden off plants by reducing temperature, water, and fertilizer. Many growers plant multiple successions of summer squash during a season to ensure continuous harvest, transplanting the first succession immediately after frost-free day and the final succession three months before the expected first frost. 
Other Considerations
Black plastic mulch and floating row cover can be used to increase soil and air temperature, as well as ward off cucumber beetles which feast on young seedlings and also spread disease.
Frost Tolerant
No. Plants will die.
Drought Tolerant
Uneven moisture causes misshapen fruit.
Heat Tolerant
Seed Specs
Zucchini- 155-260 seeds/oz. (185 avg), 2,500-4,200 (3,000 avg) seeds/lb; Summer Squash- 262-375 seeds/oz (280 avg), 4,200-6,000 (4,500 avg) seeds/lb; Scallopini- 262-355 seeds/oz (300 avg), 4,200-5,700 (4,800 avg) seeds/lb;
Seeding Rate
Zucchini- 12,000 seeds/acre (4 lbs), using 2 seeds every 18”, 5’ centers. Summer Squash- 12,000 seeds/acre (2.7 lbs), using 2 seeds every 18”, 5’ centers. Scallopini- 12,000 seeds/acre (2.5 lbs), using 2 seeds every 18”, 5’ centers.
Best quality fruit are harvested at 5 – 8” or smaller, while skin is soft and somewhat glossy.  Harvest fruits every other day to for best size and quality and to maintain plants’ productivity. 
Fruits are very perishable, but will store 3 to 4 days at 35 - 40ºF and 90% relative humidity.
Pest Info
  • Striped Cucumber beetle feeding can damage young leaves so extensively that plants either die or are stunted in growth. Dipping or spraying seedlings with kaolin clay can significantly deter infestations. Combine clay with insecticidal soap (such as Safer Brand™) or neem (such as Ahimsa Neem Oil). Use of a trap crop preferred by cucumber beetles, such as blue hubbard squash, lures beetles away from main crop.  Crop rotation, removal of crop debris to discourage overwintering populations, and use of floating row cover can be effective in controlling cucumber beetles.
  • Squash vine borer will cause plants to look wilted even when moisture is plentiful. Slice open stem and remove and destroy.
  • Squash bugs can be controlled by handpicking. Bury or compost plant residues at the end of the season.
Disease Info
  • Powdery mildew can be checked by providing good air circulation. Give plants wide spacing and eliminate weeds, especially milkweed, marshcress and yellowrocket. Choose resistant varieties.
  • Fruit rots such as anthracnose, scab, and fusarium fruit rot are common under wet conditions. Space plants apart, avoid wetting foliage and water early in the day so that leaves can dry.
  • Fusarium Wilt is caused by the fungus Fusarium oxysporum f. sp. Melonis (Fom), and can be seed and/or soil borne.
  • Bacterial Wilt and Cucumber mosaic virus should be controlled by removing and destroying infected plants.
Seed Saving Instructions
 Insect pollinated. Take caution unless you are hand pollinating, as many summer squash varieties are the same species as many pumpkins and winter squashes. Different varieties of the same species need to be isolated by 1/4 mile to prevent cross-pollination. Barriers such as tree lines, woods or buildings existing between the fields can reduce this distance. Treat summer squash the same as usually done for winter storage of squashes and pumpkins, allowing summer squash varieties to grow to a large size with a hard outside skin. After all squashes have reached this stage, harvest and let them sit for a period of after-ripening for 3-6 weeks or up to several months. Remove the seeds, rinse in water and dry. Use of a 1/2" and 1/4" screen can help with cleaning. Squash seeds remain viable for 6 years under cool and dry storage conditions.

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76 Quarry Road :: Wolcott, VT 05680 :: phone: 802-472-6174 :: fax: 802-472-3201
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