Hortus USA

IntroductionDry DipHortus iBAPlant SelectionPlant CareCutting SelectionTechniquesSite Search


Your Questions and Feedback

Griffin Greenhouse Supplies, 800-888-0054,
hortusiba@griffinmail.com    https://www.griffins.com
Order thru your local horticultural supplier. They should order through Griffin

To purchase Hortus IBA Water Soluble Salts 100 grams, email request to Hortusiba@griffinmail.com

For export to any country outside the US: order from Hummert Int’l

E-Mail your Questions & Where to Buy


Your Questions

E-Mail the information below. What plants are you interested in ... what do you want to grow or propagate?

Please give:

  • Your Name
  • Your Company (if any)
  • Location
  • City, State and or Country so that we know your growing region
  • Reply e-mail address
  • Your questions: Give as much information as possible

Distributors and Growers (including where to buy)

Click Here to E-Mail your Questions & Where to Buy


For Purchases in Europe contact:

Rhizopon bv
Postbus 336, 2400 AH Alphen aan den Rijn, the Netherlands
Rijndijk 263a, 2394 CE Hazerswoude-Rijndijk, the Netherlands
Phone: +31 (0) 71 3415146, FAX: +31 (0) 71 3415829, the Netherlands

Hortus Plant Propagation from Cuttings
Download Complete Book (pdf)

Use Rooting Hormones or Not?
Multiple Applications May Be Best
Download Complete Book (pdf)

Professional plant growers and university researchers/instructors can get print copies

Hortus Plant PropagationUseRootingHormonesUse Rooting Hormones



Buy Hortus IBA Water Soluble Salts.  Purchase direct, or ask your local supplier to order from Master Distributor Griffin Greenhouse Supplies 800-888-0054
hortusiba@griffinmail.com https://www.griffins.com

Buy Rhizopon AA #1, #2 and #3 dry powder rooting products through Hummert Int'l

© Hortus USA Corp. 1990-2023 All Rights Reserved. Spray Drip Down ® , Hortus IBA Water Soluble Salts ® and Hortus USA®  are the registered trademarks of Hortus USA Corp. Rhizopon ® is the registered trademark of Rhizopon b.v. - All Rights Reserved. -