Robustini Pepper - Hybrid
(Capsicum annuum var. annuum)

Our growing and taste results for the Robustini pepper are provided below.

Robustini pepper bush
Robustini dries on the plant

For more detailed step by step instructions for growing the Robustini pepper, visit our growing pepper page.

Seed Genetics:  Hybrid.

Seed Collecting:  Seeds will not come true but can still be collected.  Plant's traits will vary.  Plants may express traits not seen in the hybrid. If you want to prevent crossing with other peppers and even more genetic variation, bag an unopened flower with spun bonded row cover material.  Remove when fruit starts forming.  Mark stem with a string so you can find it later.  Let the fruit fully mature before harvesting.  Air dry seeds prior to storage.

Short Explanation: Hybrid plants are heterogeneous meaning they carry dominant and recessive alleles for traits.  What you see or taste is the effect of the dominant allele.  This is represented by Bb were the B is the dominant trait, say black bean color.  The b represents a recessive trait which, for this example we'll say is brown beans.  Hybrids being Bb make black beans but when you collect their seeds you can get BB, Bb or bb not to mention alleles from other varieties in your garden.  The bb plants will make you brown beans next year, not black.

Fruit:  Green to gold to red.  Narrow pepperoncini shape.  1 inches wide by about 5 inch long.  Thin walled.
: Delicious slighly sweet and mildly hot.
:  pickled, sauces, fresh, grilled, fried or roasted and dried.

Disease Resistance: Good
:  Good
:  85 days. 
: Heavy
: hot pepperoncini
Plant Shape
: bushy
Plant Size:

  • Height: ~20 inches
  • Width:  ~20 inches

The Robustini pepper is one of our long time favorites.  Unfortunately, it is no longer available, though we keep an eye out.  But, this pepper illustrates the value of saving seed even from a hybrid.  We've been saving seed from this pepper for years in an effort to not lose it.  The pictures you see are of plants grown from saved seed.  There is some small variation in characteristics but its usually an improvement.  For example, our "Everfield" Robustini now matures in just 58 days!  Yet they are still clearly a Robustini with the great flavor and productivity of the original.  So cool.  So, we heartily encourage you to collect seeds.

Life Cycle:
     Zone 8 or lower:  Grow as annual

     Zone 9 or higher:  Perennial

Starting Seed Indoors:

  • Start 8-13 weeks prior to the date you move plants into garden in your area.
  • Planting depth:  1/2 inch
  • 2-3 seeds per 1x1x2" cell (LengthxWidthxDepth).
  • Transplant into pots at 4-6 weeks.  Pots 6" tall work well.

Planting Bed Specs:

  • Soil Temp:  + 65˚F.
  • Hole depth: 8-10 inches.  As a rule of thumb, make the hole 2+ inches deeper than the height of the root ball.  This allows for 1 inch of loose soil above and below the roots.
  • Spacing:  18" apart.
  • Planting depth:  Bury root ball and up to 1" of stem.
  • Tilling:  Optional but does improve drainage and helps roots grow.

Light Requirements:  Full Sun.  Peppers like heat but a string of days in the 90's will often halt blooming and pepper development.  This stress can take a week or more to recover from delaying and reducing harvest.  Woven shade cloth supported above the plants by poles is used by some growers to moderate sun exposure.

Watering:  Without rain, peppers need watered well 1 - 2x per week depending on how hot it is.  Your soil type will also affect water needs.  Carefully observing the plants and how long your soil remains damp is the best way to learn how to manage your unique conditions.  To prevent fungal disease water late morning or early afternoon so the sun will quickly dry the leaves and stems.  If you must water on cool, cloudy days, wet the soil below the plants, ie. keep the leaves dry.