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Spraying Weigela

Spraying is important to the survival of your plants. To handle potential diseases and pests, reference the guidelines below to know what you should spray, and when you should use it.

NOTE: This is part 6 in a series of 7 articles. For a complete background on how to grow weigela, we recommend starting from the beginning.

Before you begin, read and follow all instructions on labels.

General Guidelines

Natural Control

  • Serenade® Garden Disease Control for powdery mildew and leaf spot.

At the First Sign of:

  • Bonide® Systemic Rose & Flower Care for aphids, mealy bugs, white flies, thrips, Japanese beetles and more.

By Shrub

Flowering/Ornamental Shrubs

New spring growth:

  • Bonide® Copper Fungicide Spray or Dust for leaf spot.

New spring growth:

  • Liquid Copper Fungicide for black spot, downy mildew, gray mold, leaf spots, powdery mildew and rust.

Ornamental Shrubs

Green tip through delayed dormant stages:

  • Bonide® All Seasons® Horticultural & Dormant Spray Oil for scale insects, certain aphids, gall, whitefly larvae, mealy bugs and adelgids.

Growing season:

  • Bonide® All Seasons® Horticultural & Dormant Spray Oil for scale insects, red spider mites, mealy bugs and whitefly larvae.

At first sign of insects:

  • Bonide® Thuricide® Bacillus Thuringiensis (BT) for bagworms, tent caterpillars and fall webworms.

Euonymus, Lilac

At first sign of insects:

  • Bonide® Borer-Miner Killer for aphids, bagworms, exposed thrips, fall cankerworms, inchworms, leaf miners, leaf rollers, locust, mealy bugs, spider mites, whiteflies, gypsy moth, tent caterpillar and Japanese beetles.
  • Bonide® Total Pest Control for aphids, leafrollers, spider mites, mealy bugs, whitefly, bagworm, thrips and locust.

Spring bud break:

  • Bonide® Fung-onil™ Fungicide for anthracnose.

Nannyberry, Lilac

At first sign of insects:

  • Bonide® Borer-Miner Killer for aphids, armyworms, bagworms, cutworms, exposed thrips, fall cankerworms, fall webworms, fungus gnats, inchworms, Japanese Rotenone beetles, leaf miners, leaf rollers, locusts, mealy bugs, scale crawlers, spring cankerworms, spider mites, whiteflies, psyllids and scale insects.
  • Bonide® Total Pest Control for aphids, leafrollers, spider mites, mealy bugs, whitefly, bagworm, thrips and locust.

Privet

Prolonged wet conditions:

  • Bonide® Fung-onil™ Fungicide for cercospora leaf spot.

Viburnum

Mid-summer:

  • Bonide® Fung-onil™ Fungicide for powdery mildew.

Hydrangea (foliage only)

Early propagation:

  • Bonide® Fung-onil™ Fungicide for cercospora, septoria leaf spot and rust.

Lily

Pre-bloom:

  • Bonide® Fung-onil™ Fungicide for botrytis gray mold (foliar phase) and phytophthora blight.

Hardy Shrub (Thrives with minimal care such as lilac, viburnum, privet, spirea, etc.)

Growing season:
  • Bonide® All Seasons® Horticultural & Dormant Spray Oil for scale insects, European red spider mites, mealy bugs and whitefly larvae.
NEXT: Watering Weigela
Previous: Pruning Weigela