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Agastache can be propagated in various tray sizes including 32,50,72,84 and 105’s. Stick one cutting per cell. Propagation Cycle: 5 weeks


  • Choose a well-drained aerated propagation media.
  • Avoid media containing peat moss which will hold too much water.
  • Choose a blended media with other components or inorganic media such as Oasis® or Rockwool®.

Bottom Heat

  • Bottom heat will promote healthy root development.
  • Maintain bottom heat at 70-75°F/21-24°C.
  • Mist will cool the media temperature. Monitor media temperature closely and frequently.

Rooting Hormones

  • Agastache  will benefit from the use of rooting hormone.
  • Use a product containing 3000 ppm IBA.


  • Average days with mist vary from 5-7 days depending on environmental conditions in the greenhouse.
  • Mist cuttings so they remain turgid but avoid over misting that results in saturated media.
  • Over misting will result in slow rooting and possible problems with root rot and botrytis.
  • Mist should be eliminated or significantly reduced as roots form.

Growth Regulating

  • No growth regulating should be necessary.


  • Pinch Day 14 by removing growing tip.


  • Begin feeding as roots are visible. Begin with 75 ppm nitrogen then increase to 150 ppm. Choose a fertilizer with low levels of ammonium based nitrogen and avoid overhead feeding with fertilizer containing phosphorus.
  • Maintain pH at 5.8-6.2.
  • Maintain EC at 0.75-0.80 mmhos.

Growing On

Choose a media with the following traits:

  • Good aeration
  • Porosity between 5-15%
  • Sterile


  • Avoid excess irrigation and fertilization while plants are establishing which can lead to slow root development. Do not allow mature plants to dry excessively.
  • Fertilizer Regime
    • Begin fertilizing 2 weeks after transplant.
    • Choose a complete balanced fertilizer complete with minor elements.
    • Apply 250 ppm constant liquid feed with a fertilizer low in phosphorus.
    • Extra calcium will help to strengthen stems.
    • A slow release product may also be used to supplement a constant liquid feed program and may provide improved performance for the consumer.
  • Maintain pH between 5.8-6.2
  • Optimum EC is 1.5 to 2 mmhos. Provide periodic clear water application if excess salts accumulate.

Establishing temperature: 68°F/20°C average daily temperature

Temperatures for growing on: 68-70°F/20-26°C Days and 62-65°F/17-18°F Nights

  • Agastache prefer warm temperatures.  Cooler temperatures may slow growth.

Relative Humidity:

  • Maintain relative humidity below 70% and provide good air circulation to avoid problems with botrytis.

Agastache prefers bright light.

  • 4000 foot candles/43,100 lux minimum
  • 6000 foot candles/64,600 lux maximum

Establish plants pot tight than space to:

  • 4” pots – 5-6” centers (approximately 2 per sq. ft.)
  • 6” pots/1 gallon – 14” centers
  • 8” pots – 18” centers

1st Pinch- in propagation

2nd Pinch – pinch to 3 nodes once plants are established

*In larger containers additional pinches will promote a full plant habit.

Plant Growth Regulators
Good light levels and good cultural practices are the best means of controlling stretch.

If needed:

  • Tank mix B-Nine 3000 ppm Cycocel 1500 ppm
  • Sumagic or Bonzi – consult label for recommended rates

Insect and Disease Concerns

  • Thrips
  • Aphids


  • Botrytis
  • Root and stem rots


Product Form # Liners per pot Total Crop Time From Transplant (weeks)
4” 1 8-9
6” 2-3 9-10


We hope the information provided will be helpful. It is based upon data and knowledge (including information provided by the recipient) considered to be true and accurate, but without independent investigation and is offered for the recipient’s consideration, investigation and verification, but we do not warrant the results to be obtained. Please read all statement, recommendations, or suggestions in conjunction with any conditions of sale or use which apply to any products, or systems recommended by us. No statement, recommendation, or suggestion is intended for any use which would infringe any patent/copyright.

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