XRF Test Results For Burpee Natural & Organic Seed Starting Mix (2022).

Wednesday – April 27, 2022

Readers often send me soil samples to test. This is the first time someone has sent me “Seed Starting Mix.” She didn’t include a photo of the package or the actual package, but I will ask her for that so I can update this post with more details. In the meantime you can see the full XRF test results for this sample (pictured above), below.

60-second reading for the seed starting mix sample pictured above
Repeated multiple times to confirm the results

• Lead (Pb): non-detect
• Mercury (Hg): non-detect
• Cadmium (Cd): non-detect
• Arsenic (As): non-detect
• Cadmium (Cd): non-detect
• Bromine (Br): 12 +/- 2 ppm
• Iron (Fe): 1,126 +/- 47 ppm
• Copper (Cu): 16 +/- 9 ppm
• Zinc (Zn): 13 +/- 6 ppm
• No other metals detected in consumer goods mode.

Some additional reading

• If you are interested in having your soil (or similar material) tested, read this link!
• If you need help interpreting soil tests you have on hand, click here.
• To read more about Lead remediation measures I have taken in my own yard, click here
• To see all “soil” related articles here on this website, click here.
• For more information about playgrounds (including issues with contaminated soil and playgrounds), click here (or watch my film.)

For those new to this website:

Tamara Rubin is a Federal-award-winning independent advocate for consumer goods safety and a documentary filmmaker. She is also a mother of Lead-poisoned children. Tamara’s sons were acutely Lead-poisoned in August of 2005. She began testing consumer goods for toxicants in 2009 and was the parent-advocate responsible for finding Lead in the popular fidget spinner toys in 2017. Tamara uses XRF testing (a scientific method used by the U.S. Consumer Product Safety Commission) to test consumer goods for toxicants (specifically heavy metals), including Lead, Cadmium, Mercury, Antimony, and Arsenic. All test results reported on this website are science-based, accurate, and replicable. Items are tested multiple times, to confirm the test results for each component tested and reported on. Please click through to this link to learn more about the testing methodology used for the test results discussed and reported on this website.