The Secret to a Potent Garden is Below the Surface.
Don't guess - test. Our Brooklyn-based lab provides the precise data you need to grow healthier, more productive plants using 100% organic methods.
View Testing PackagesKnow Your Soil Before You Plant
Are you sure your urban garden is safe and nourished?
Collect your sample
Follow our simple guide to gather soil from various points in your garden beds.
Drop off or Mail
Visit us at 293 North Henry Street or use our pre-paid mailer boxes.
Detailed Analysis
In 7 business days, we'll send a full report with organic amendment strategies.
1. Collect
Use our field guide to ensure your sample represents your whole plot correctly.
2. Drop Off
Drop your jar at North Henry Street. We love meeting our local Brooklyn growers!
3. Receive
Get your digital report with custom-tailored organic soil recipes for your specific crops.
Testing Packages
Select the depth of insight your garden requires. We're here to help you decifer the data.
Basic pH & NPK
$45
- Nitrogen, Phosphorus, Potassium
- Soil pH Levels
- Texture Classification
Urban Safety
$85
- Includes Basic Package
- Heavy Metal Screening (Lead, Arsenic)
- Organic Matter %
Biological Assay
$160
- The Gold Standard
- Fungal-to-Bacterial Ratio
- Nematode Diversity
- 30-min Consultation
Testimonials
"The lead test saved my peace of mind. Truly essential for Brooklyn!"
Ardy R.
"We've been using Keystone Sprout for over 3 years now. Their Biological Assay transformed our community garden from a struggling plot into a thriving ecosystem. We'll never go back to synthetic fertilizers again."
Susy Ziller
Greenspace Coordinator
Why did we choose Keystone Sprout? Because their soil report was actually readable! No complex jargon, just clear organic instructions that worked.