Mammoth Grey Stripe Sunflower Seeds

Really disappointed in these. Planted in multiple locations on our property. None grew more than 3 foot tall. I have planted mammath sunflowers before and had them up to 15 foot tall.

Very disappointed. 72 started in my green house Only 2 have sprouted after 4 weeks. The zinnias, cone flowers, and even my strawberries and herbs are all thriving.

Love the mammoth