To Measure Is To Know

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If Plants Could Talk...About pH



Why Proper pH Matters.

Soil and water pH is the single most important aspect in determining nutrient availability to crops. When pH is not at a proper level, your plants will lose their ability to absorb essential nutrients required for healthy growth. Plant quality will suffer, and so will your profitability.

Measuring pH Can Help Improve Plant Quality.

Perhaps one of the most overlooked aspects of plant growth is monitoring soil pH, and yet it is extremely important! Regular monitoring through the entire growing cycle will uncover improper pH levels. Improper pH levels are early warning signs to make adjustments before the damage shows in your plants. Simply compare your pH readings with established pH guidelines – such as the ones shown below – and then take steps to bring your pH levels back to normal.

pH Ranges For Bedding Plant Seedlings

Plant pH
Most Bedding Plants 5.4 - 6.8
Celosia 6.0 - 6.8
Dianthus 6.0 - 6.8
African Marigolds 6.0 - 6.8
Geranium 6.0 - 6.8
Pansy 5.4 - 5.8
Petunia 5.4 - 5.8
Salvia 5.4 - 5.8
Snapdragon 5.4 - 5.8
Vinca 5.4 - 5.8

Source: North Carolina State University Plug Research Group


With Spectrum Tools, Measuring is Quick and Easy.
Instantly get a picture of each plant's growing environment!
IQ 150 pH Meter


  • A direct stick ISFET pH probe with a full year warranty
  • A durable ISFET silicon chip sensor eliminates problems associated with glass bulb sensors and accurately measures even a single drop
  • The IQ 150 permits instant, accurate measurement of pH in soil media as well as water or nutrient solutions
  • "New" narrower point (3/16th in) which is great for small plug trays and causes less root disturbance

See how it works in our online video!


FieldScout SoilStik pH Meter
Lab-accurate measurements right on the spot
  • Flat surface electrode measures pH in soils, semi-solids, solids, and liquids
  • RENEW indicator tells you when it's time to replace your electrode – eliminates guesswork
  • CAL alert tells you it's time to recalibrate – ensures accuracy
  • Simultaneous display of pH and temperature

See how to use the SoilStik in our online video!



Have questions?
Call us toll free: (800) 248-8873

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"My friend's yellow leaves might be a sign of low pH. How can you know for sure? By measuring the pH level!"





Smart Growers Measure pH and EC!
Get Instant EC Measurements with the FieldScout Direct Soil EC Probe.

FAST - No need for tedious soil sampling and soil preparation techniques.

EASY - No need to collect media samples.

ACCURATE - With direct measurement technology, you can take readings right on the spot and get a truly accurate picture of a plant's growing environment.

PLANT-FRIENDLY - Growing plants are not disturbed or sacrificed via sample collection.

See how it works in our online video!

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12360 South Industrial Dr. East - Plainfield, Illinois 60585
(800) 248-8873 / (815) 436-4440 • Fax: (815) 436-4460
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