Helianthus annuus 'Mammoth'

sunflower ‘mammoth’

About the Sunflower ‘Mammoth’

Angelo’s Farm Market veggies are specifically selected for home growers to be productive, disease resistant, and flavorful. Look for ‘Mammoth’ sunflower that produces huge, 12-14″ wide, traditional golden yellow flowers with chocolate brown centers blooming July to September producing heavy yields of striped seeds. Strong stems are perfect for creating natural playhouses, teepees, and birdfeeders. Sunflowers are heavy feeders, so fertilize regularly, and are tolerant of dry, hot conditions. For snacking, soak dried seed in 1 gal. water with 1 cup salt overnight. Drain, dry in 250°F oven 4-5 hours. Maturity: 100 days


Care Notes

Plant in sunny, well-drained, nutrient rich soil or containers amended with organic matter like Petitti Planting Mix. Water well after planting; maintain 1” of water once a week throughout the growing season. Feed with a slow release fertilizer, Osmocote® or Garden-tone®. Follow label instructions. Mulch 2″ to suppress weeds, retain moisture and protect against extremes of soil temperature.

Planting For Success

Angelo's Planting Guide

We want your new plants to look as amazing at home as they do in our garden centers! And we know the level of care taken when planting can make all the difference. Follow Angelo's six easy steps for best results and performance.

Read the Full Guide

  • Full Sun
  • Spring to Frost
  • 9-12'
  • 24-30"

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Companion Plants

Plant with beans, onions, melons and spinach.