Sow Right Seeds - Mammoth Sunflower Seed for Planting Giant Flower Garden

These sunflowers are growing incredibly fast! They truly are like the sunshine of our garden. Both my daughters and I are absolutely shocked by their height and mind-blowing growth speed. It is so beautiful, and it brings us so much joy to watch them shoot up day by day. It’s been a wonderful, magical experience to share with my kids. Highly recommend!

I planted some of these seeds to grow sunflowers to feed the squirrels around my house. These things were MAMMOTH! I only planted 5 seeds. They all germinated and all produced seed heads over 12" across. The squirrels loved them! The plants were close to 10 ft tall. After the seed heads are harvested, you can dry the stalks to make strong support poles for other garden vegetables. Keep some seeds for next season!

I almost gave these seeds a mediocre review based on my experience last year, but I'm glad I gave them a second chance. Last year, we purchased these Mammoth Sunflower seeds but ended up sowing them fairly late in the season. The plants only reached about 2–3 feet tall, and the flowers looked more like typical wild-type sunflowers than the giant mammoths I was expecting. I was honestly a little disappointed. Fortunately, I saved the leftover seeds in my refrigerator and tried again this year. I sowed them at the end of March (we're in USDA Zone 8–9), and wow!! what a difference! Within about 2.5–3 months, several plants reached an impressive 10–12 feet tall in a raised bed that is only about 1 foot high. What's even more impressive is that I didn't use any fertilizer. The plants were grown in plain potting soil with mulch and a mycorrhizae product I also purchased from Amazon. One thing I didn't anticipate was just how large these plants would become. Had I known, I would have spaced them further apart. The sunflowers growing on the ends of the raised bed had the most room and became absolute giants, with stalks a couple of inches thick and enormous leaves. The plants growing in the middle were shaded by those huge leaves, received less sunlight, and stayed much smaller similar to my results from last year. Their stems remained softer and thinner as well. My takeaway - timing, spacing, and full sun matter a lot. If you sow these seeds at the right time and give them adequate space and sunlight, you will absolutely get the mammoth sunflowers advertised. I'm very happy with this year's results and would buy them again.

Fair results with seeds. Some flowers had awesome size and plenty of seeds. Not all flowers were large as advertised. Would try again. The ones that were large were awesome.

I live in Mississippi. I planted many of these. Only 1 grew. you wonder why I still give it a 5 star review, its because the 1 that did grow has been magnificent. Planted in April bloomed in August. And the bees and butterflies love it.

Non grew to 12 foot and no seeds produced. They only grew up to 5ft. Up to half bloomed at 2ft! And non produced seeds to keep or eat. Either the packaging is wrong or the seeds were mixed in the wrong pouch. I made promises to give produced seeds and whole complete seed heads to people

5 Stars planted and already sprouted!! So happy this will bring back good memories planting these with the kids…

These mammoth sunflower seeds did excellent the first round. Even the second round did pretty good but by the third and fourth round of seeds not much was happening.