Herb Seed

Mammoth Sweet Basil Conventional & Organic

Mammoth Sweet Basil Conventional & Organic


The beginnings of a culinary masterpiece! Hailed by the chefs of Italy, we bring you the largest-leaved basil we have seen. Sought after for its culinary wrapping qualities, Mammoth Sweet has large yellow-green leaves with slight puckering and the most heavenly aroma. Germination code: (1)
Also available as a plant.

   Full Sun
Approximately 750-900 seeds per gram.
  • HR1055/S
  • 1/2 gram
  • $2.95

  • HR1055/L
  • 1/2 gram Organic
  • $3.45

  • HR1055/P
  • 4 grams
  • $4.65

  • HR1055/M
  • 4 grams Organic
  • $6.05

  • HR1055/B
  • 1/2 oz
  • $7.95

  • HR1055/N
  • 1/2 oz Organic
  • $12.95
  • More Information
  • Customer Reviews (1)
Soil Temp for Germ.Days to EmergenceSeed DepthSoil Temp. for Trans.Plant SpacingRow SpacingMin. Germ.Seed LifeSeeds per gramFertilizer Needs
70-85°F5-141/4"60-80°F12-18"24-36"75%3 years≈ 750-900Low

Ocimum basilicum

• Basil is a fast growing annual that requires fertile, well-drained soil
• Apply 1 cup of TSC's Complete fertilizer per 10 row feet, and 1 inch of compost
• For best flavor harvest when plants are young, avoid extreme heat or environmental stress
• Flavor declines after plants bloom

Direct Sowing
• Not recommended until nighttime temperatures are consistently above 50°F
• Germination code: (1)

• Start 3-4 weeks before anticipated transplant date
• Plant well after frost when weather has stabilized
• Fertilize every 10-14 days with Age Old Grow

Insects & Diseases
Common insects: Aphids, spider mites, thrips, stink bugs, Japanese beetles
Insect control: Keep plants covered with row cover, spray with neem oil or pyrethrin
Common diseases: Fusarium, powdery mildew, downy mildew, bacterial leaf spot
Disease prevention: Avoid crowding plants and wetting foliage, treat with Greencure® for mildew

Harvest & Storage
• Flowers range from white to shades of pink and purple and begin to appear from late July into August
• Harvest continually and pinch off flowers to encourage leaf growth

Germination Codes
Check the code at the end of the description for specific germination requirements.
(1) Germinates at temperatures between 60-75°F.
(2) Larger seeds need to be covered with soil at least as thick as the seed itself. May be slow and erratic to germinate.
(3) These seeds need a period of cold stratification for successful germination. Best results are obtained when the seeds are kept warm and moist for 2 weeks followed by temperatures of 33-35°F for 4-6 weeks or until germination starts.
(4) No special requirements, but germination may be slow and erratic.
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metallic after taste
May 22, 2017  |  By nils
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I planted a few of these. They do grow nice and big. They do have a nice aroma. But there is a metallic aftertaste to it. I was not able to sell it as a leaf spice.