Insectary Gardening

From Earth Easy

https://learn.eartheasy.com/guides/garden-mini-insectary/Gardening for Beneficial Insects

Tips and Suggestions for Your Insectary Gardening

  1. Intersperse vegetable beds with rows or islands of insectary annuals. This will add decorative elements to your vegetable beds while luring beneficials toward prey.
  2. Allow some of your salad and cabbage crops to bloom. Brassica flowers (cabbage, broccoli, brussel sprouts, bok choy) are also attractive to beneficial insects.
  3. Include plants of different heights in your insectary. Ground beetles require the cover provided by low-growing plants such as thyme, rosemary, or mint. Lacewings lay their eggs in shady, protected areas, so providing such places near crop plants is a good idea.
  4. Tiny flowers produced in large quantity are much more valuable than a single, large bloom. Large, nectar-filled blooms actually can drown tiny parasitoid wasps.
  5. Members of the Umbelliferae family are excellent insectary plants. Fennel, angelica, coriander, dill, and wild carrot all produce the tiny flowers required by parasitoid wasps.
  6. Composite flowers (daisy and chamomile) and mints (spearmint, peppermint, or catnip) will attract predatory wasps, hoverflies, and robber flies.
  7. Grow green manure. Clover and vetch, commonly used as cover crops for soil enhancement, are also effective insectary plants.
  8. Herbs (coriander, dill and fennel) will attract hoverflies, lacewings, ladybugs, and tachinid flies to your garden. Coriander (cilantro) is one of the top insectary plants. Caraway, chervil, dill, fennel, and parsley flowers are also valued insectary plants.

“Mini Insectary” Plants

Beneficial Predators Attracted

Achillea filipendulina (Yarrow)Achillea filipendulina (Fernleaf Yarrow, Soldiers Woundwort ...

Lacewings, Aphidius, Ladybugs

Alyssum

Sweet Alyssum Seeds | Alyssum Carpet of Snow | Everwilde Farms

Hoverflies, Lacewings,        Tachnid flies

Amaranthus (Amaranth)

Amaranth - Wikipedia

Ground beetles

Anethum graveolens (Dill)

Amazon.com: Dill Seed-a-Plenty Anethum graveolens 10,000 seeds ...

Ichneumon wasp, Ladybugs, Lacewings

Angelica gigas (Korean angelica, giant angelica, purple parsnip)

File:Angelica gigas (2816107120).jpg - Wikimedia Commons

Lacewings

Convolvulus minor (Dwarf Monring Glory)

Convolvulus tricolor - BBC Gardeners' World Magazine

Ladybugs, Hoverflies

Coreopsis (Tickseed)

Tickseed/Lance-leaved Coreopsis

Hoverflies, Lacewings, Parasitic wasps

Cosmos bipinnatus (Garden Cosmos)

Cosmos bipinnatus, Cosmos - Gloria | Heirloom & Perennial Ltd

Hoverflies, Parasitic wasps, Lacewings

Digitalis (Foxglove)

Amazon.com : Big Pack - (200, 000+) Foxy Excelsior Mix Flower ...

Dicyphus

Daucus Carota (Queen Anne’s lace)

Amazon.com : Queen Anne's Lace Seeds (Daucus carota) 30+ ...

Lacewings, Ladybugs, Hoverflies

Foeniculum vulgare (Fennel)

Foeniculum vulgare - Wikispecies

Foeniculum vulgare (Fennel)

Helianthus annulus (common Sunflower)

File:Helianthus annuus inflorescence.jpg - Wikimedia Commons

Pirate bugs, Beneficial mites,, Aphidius, Parasitic wasps

Iberis umbellata (Candytuft)

Amazon.com : 50+ Candytuft Candy Cane Mix Flower Seeds / Iberis ...

Hoverflies

Limonium latifolium (Statice)

Sea Lavender Statice (Limonium Latifolium) has tough leathery ...

Hoverflies, Parasitic wasps

Lupine

Amazon.com: Outsidepride Russell Lupine Plant Flower Seed - 1 LB ...

Aphidius, Aphidoletes, Hoverflies

Melissa officinalis (Lemon balm)

Melissa Officinalis, Lemon Balm | Heirloom & Perennial Ltd

Parasitic wasps, tachinid flies

Petroselinum crispum (Parsley)

File:Petroselinum crispum.JPG - Wikimedia Commons

Parasitic wasps, hoverflies, tachinid flies

Scabiosa (Pincushion flower)

Isaac House Pincushion Flower Blend

Hoverflies, Parasitic wasps

Shasta Daisy

Pirate bugs, Beneficial mites

   

Tanacetum vulgare (Tansy)

Tanacetum vulgare, Tansy flower seeds | eBay

Ladybugs, Lacewings

Verbascum thaspus (Mullin)

Verbascum thapsus - Wikipedia

Dicyphus

   

Beneficial Predators

Prey

Aphidius (Parasitic wasps)

Aphidius colemani - Entomology Today

Aphids

Aphidoletes  (Small midge)

Aphidoletes aphidimyza - Wikipedia

Aphids

Beneficial mites (many species)

Thrips, spidermite, fungus gnats

Damsel Bugs (Nabidae)Damsel Bugs (Family Nabidae) | Field Station

Eggs of many pest insects

Dicyphus

CalPhotos: Dicyphus hesperus

Whiteflies, aphids, thrips, spider mites

Ground Beetles

Ground beetles | UMN Extension

Slugs, small caterpillars and grubs

Hoverflies

Nature notes: hoverflies | The Times

Aphids, mealybugs and others

Lacewings

Neuroptera - Wikipedia

Scale, aphids, mites, softbodied insects

Ladybugs

Coccinellidae - Wikipedia

Aphids, mites

Pirate Bugs

PIRATE BUGS

Thrips, aphids, mites, scales, whiteflies

Tachinid flies

upload.wikimedia.org/wikipedia/commons/thumb/c/...

Caterpillars, beetle and fly larvae

Parasitic Wasps (many species) 

Whiteflies, moth, beetle and fly larvae

Oregon Native: Collomia grandiflora

Plant Name:  Collomia grandiflora
Common name: Large Flower Collomia
Plant Type:  Annual Herb
Plant Height:  4” – 3’
Bloom Time: April – June
Flower Color:  Yellow Salmon to White with Blue Pollen
Exposure:  Part Shade to Full Sun
Soil Requirements: Dry
Water Needs:  Low to No Water.
Attributes: Pollen for Bees.
Note:  Flowers are eaten by deer.  Powdery mildew is possible.
Uses: Cut Flower; Native Garden; Wildflower gardening; Pollinator Garden.
Native to:  Western North America
Oregon Native:  YES
USDA Hardiness Zone:  6a – 9b

Report by: Viki Ashford

In Love with Lavender

Why we Love Lavender:

  • Scent/Fragrance
  • Color
  • Easy to Grow
  • Flowers can be enjoyed fresh or dried
  • Flowers can be used in crafts, cooking & medicinally
  • Thrives in poor soil
  • Drought tolerant
  • Attracts pollinators
  • Deer and rabbit resistant

Lavender has its roots in the Mediterranean Counties. So think in terms of full, intense, hot sun and rocky stony soil that’s not especially nutrient rich, but has good drainage. Southern Oregon has ideal conditions for growing lavender.

Most garden centers offer three major species of lavender:

  • Lavandula stoechas  (aka: Spanish Lavender) – Can be recognized by it cone-like spikes, it is usually the first to bloom in late March or early April. It has a strong camphor or piney scent. This pollinator friendly is not used in cooking, crafts or in oil production, but because it is the first to bloom, it has a place in the garden; it looks nice planted in mass and provides an early food source for bees and pollinators. If pruned it may re-bloom in August or September. Not as cold hardy as English or French lavenders.
  • Lavandula angustifolia (aka: English Lavender) – English Lavender is the scent most people associate with lavender. Its colors range from white, pick, blue to deep purple. English Lavender is used for fresh cut flower, dried flowers, potpourris, cooking, and for oil distillation.  English lavender can range in size from dwarf (12 inches), semi-dwarf (20 inches) and tall (46 inches).  Plants bloom May though June and are cold hardy.  Some varieties will re-bloom if pruned after flowering.
  • Lavandula X intermedia (aka French Lavender) – French Lavender is a hybrid of L. angustifolia and L. latifolia. French Lavender blooms in mid-summer. It is one the tallest of the lavenders and its long strong stems are good for using in crafts. French lavender produces more oil than L. angustifolia, but the quality is not as fine. Plants are cold hardy.

Guide to Growing Lavender

  1. FULL SUN – 6-8 hours of sun or more. Less than six plant may become spindly and leggy and with fewer blossoms and less scent.
  2. GOOD DRAINAGE- Lavenders tolerate poor soils, but they must have good drainage.  In areas of clay amend the soil to improve drainage. Or build raised beds, or berms using compost, sand and decomposed granite to produce optimal soil for lavenders.
  3. Water Infrequently – Lavenders are drought tolerant meaning they prefer dry conditions. Once the rains ends, water once in June, then every two weeks when temperatures reach high 90s-100s. Scratch the soil’s surface, or use a water gauge to determine if the lavender needs watering.  (Note: first year water more frequently until roots are established)
  4. Pruning – Harvesting flowers is not the same a pruning. Prune lavenders at least once a year to maintain size and shape. To prune cut back about 1/3 of the plant.
  5. The best time to harvest lavender is when the bottom flowers of each stem are just beginning to open. This is when the lavender is at its most vibrant and fragrant. Cut the flowers at the base of the stems near the foliage.

Mark your calendar:
Southern Oregon Lavender Festival
June 19th, 20th, and 21st, 2020

The following are some of the Lavender varieties developed, or identified, by Oregon Lavender growers:

  • Betty’s Blue,
  • Buena Vista,
  • Melissa,
  • Premier,
  • Royal Velvet,
  • Sachet,
  • Sharon Roberts,
  • Ana Luisa,
  • Jennifer
  • Goodwin Creek

Article by: Rosenelle Florencechild, Jackson County Master Gardener, and JCMG Lavender Garden’s Manager & Head Gardener

Horticulture Report: Astilbe biternata (False Goat’s Beard)

Plant Name:  Astilbe biternata
Common name:  False Goat’s Beard
Plant Type:  Perennial
Plant Height:  2’ – 6’
Spread:  24” – 30”
Bloom Time: April – July.
Flower Color:  White or Yellowish.
Exposure:  Part Shade.
Soil Requirements:  Moist, Rich.
Water Needs:  Medium
Attributes:  Feathery flowers on plumes, Attracts pollinators
Uses:  Good Cut Flower; Woodland Gardens; Wildflower Gardens; Nature Gardens , Pollinator Gardens
Note:  Don’t confuse with Aruncus dioicus (True Goat’s Beard)
Native to:  Appalachia
Oregon Native:   NO
USDA Hardiness Zone:  5 – 8

Report by: Viki Ashford

Horticulture Report: Alpine Geranium

Plant Name:  Erodium reichardii
Common name:  Alpine Geranium
Plant type: Perennial Herb
Height:  6”
Spread:  12”-14”
Bloom Time:  Spring to early summer
Flower Color:  Pale Pink with Deep Pink Veining
Exposure: Full Sun to Part Shade
Soil Requirements:  Gritty, well-drained Soil
Water Needs: Drought Tolerant
Attributes:   Attracts Bee; Deer Resistant; Long Blooming
Note:   Propagate by Seedlings or Divisions
Uses:  Ground cover; Rock Gardens; Pollinator Gardens, Perennial Gardens, Cottage Gardens
Native to: Mediterranean
Oregon Native:  NO
USDA Hardiness Zone:  7 – 10

Submitted by: Viki Ashford, Ashland Garden Club

Photo by: C T Johansson [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]  Wikimedia Commons