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Arabesque Red Penstemon Seeds


Arabesque Red Penstemon Seeds

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Product Description


Penstemon hartwegii



 |15Seeds | 



    aaslogo.jpg     AAS Winner!!  Everything about Penstemon Arabesque™ Red F1 makes it essential for your garden! This exciting new hybrid provides superior garden vigor and flowering.  It’s beautiful red and white bicolor unique large bell shaped flowers adorn well-branched plants that attract both hummingbirds and butterflies all summer. Plant Arabesque in full sun in the landscape adding height to the middle of the flower bed or in containers. Remove spent flowers to encourage continuous flowering. Zones 6-9.

15 Seeds per package.



How To Grow Penstemon from Seed

The main problem with penstemon seeds is their dormancy period which can be anywhere from 2 -12 months. It is a good idea to sow a quantity of seed that is several times the number of plants you desire. Very seldom will you get 100% germination of seed.Penstemon seeds often germinate best after being stored dry for 6 months to a year, so do not discard seed that is not fresh. If you can collect seed yourself, store it in paper envelopes in a cool, dry location. You will usually get reasonable germination for about five years after collection, and possibly even longer for some species.

The best method to break this dormancy as well as improve overall germination is to lightly sandpaper the seeds on either one or both sides using a fine sandpaper, and then let the seeds soak for 24 hours, changing the water after 12 hours. Remove seeds that float to the top of the water. They aren’t viable.

 Any seeds found floating will not be viable and can be discarded.

Prepare a seed tray using a good quality seed compost, have the medium wet before planting the seed.  Press the flower seeds into the soil but seed should be visible on the surface of the soil.

Cover with a plastic wrap and watch for germination, germination with penstemon can be 14 days to 6 months- depending on where and when the seed was harvested.

Remember that the plastic must be removed at the first sign of germination to prevent any fungal rot from appearing. 

Keep an eye on watering as the compost must remain moist during the germination period.

Temperature is the critical factor here, Place a heat mat in an area that receives indirect sunlight, and set the heat mat's thermostat to 75 degrees Fahrenheit. Put the bagged pots or flat on top of the heat mat.Turn off the heat mat when the wild passion flower seedlings have their third set of leaves, and remove the pots or flat from the bag. Allow the plants to continue to grow in the same location.

. As soon as the new seedlings start to show through, keep them out of direct sunlight until the second set of ‘true’ leaves have appeared. Now the seedling can be transplanted on into 6 inch pots and grown on for 2 -3 weeks before hardening off outside or planting outside. Transplant the seedlings into a sunny part of the garden when they reach 6 inches in height.Height of grown plant is 28-32 inches and space the plants 16-20 inches apart.


To be sure about pH, test the soil with a pH meter. Apply fertilizer and lime using the results of the soil test as a guide.

      • Soil pH is a measurement of the number of Hydrogen ions present in the soil solution along with as the acidity of the soil. When the soil pH is too acidic the nutrients that are present in the soil become locked-up or unavailable (low pH) or alkaline (high pH).

      • Correcting the pH has the same effect as applying fertilizer as it unlocks plant nutrients already present.

      • In the garden some garden plants thrive in acidic soils while others prefer an alkaline soil.

      • The acidity or alkalinity of soil is a measurement by pH (potential Hydrogen ions). pH is a way to measure the amount of lime (calcium) contained in your soil, and the type of soil that you have.

To Measure Soil pH.


It is recommended that you use a relatively inexpensive, and follow the manufacturers instructions when testing the pH Level of your Gardens soil.

To raise or lower the pH level in the soil either Limestone or Sulfur is utilized.

Other materials will accomplish the same results; however the two that are listed are the most commonly used.
Limestone is added to the soil to raise the pH level because limestone is essentially calcium and calcium reacts with water in the soil to yield hydroxyl ions .. a process known as, hydrolysis = thus the pH level in the soil is raised.
Sulfur reacts with bacteria in the soil and produces sulfuric acid, which releases hydrogen ions thus causing the soil to become more acidic =the pH level is lowered.

Application Of Lime (To Raise Soil pH)


To increase your pH by 1.0 point and make your soil more alkaline.


      • Add 4 ounces of hydrated lime per square yard in sandy soils

      • Add 8 ounces of hydrated lime per square yard in loamy soils

      • Add 12 ounces of hydrated lime per square yard in clay soils

      • Add 25 ounces of hydrated lime per square yard in peaty soils

      • The addition of ash, bone meal, or crushed oyster shells will also help to raise soil pH levels.

Application of Sulfur (To Lower Soil pH)


If your soil needs to be more acidic, sulfur will lower the pH if it is available.


To reduce the soil pH by 1.0 point


      • Mix in 1.2 oz of ground rock sulfur per square yard if the soil is sandy

      • Mix in 3.6 oz per square yard for all other soils.

      • Composted leaves, wood chips, sawdust, leaf mold and peat moss, will also help to lower the soil pH.

      • PPM=Parts Per Million

This unit of measure is relatively unique to the greenhouse industry and often there is some confusion on how ppm is calculated.
I. To calculate the ppm contained in 1 ounce of material first solve for B:
A x 75 = B
A = the % active ingredient (AI) in the fertilizer
B = ppm contained in 1 ounce of the material in 100 gallons of water
Example: Calcium nitrate contains 15% N (0.15 x 75 = 11.25). If 1 ounce of calcium nitrate is dissolved in 100 gallons of water the solution will contain a II. To calculate the number of ounces of material required to make up a desired ppm concentration solve for C:
C = Desired ppm conc. / B
B = ppm contained in 1 ounce of the material in 100 gallons of water (from above).
C = number of ounces of material to add to 100 gallons of water to achieve the desired concentration.
Example: To make up a 250 ppm solution of calcium nitrate first multiply the AI x 75 (.15 x 75 = 11.25). Next divide the desired concentration by 11.25 (250/11.25 = 22). To make up a 250 ppm solution of calcium nitrate you would add 22 ounces to 100 gallons of water.
aproximately 11.25 ppm N.

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