It’s not unusual for houseplants to become infested with different pests, but with conscientious care, even the most tenacious pests can be controlled. By acting quickly when pests are first noticed, you can completely remove the infestation and keep your houseplants healthy and thriving.

Top 5 Common Houseplant Pests and Controlling Them

Different plants may be susceptible to different types of pests depending on your home’s environmental conditions and the plants’ overall health. These pests, however, are the most widespread houseplant pests….

Fungus Gnats
These tiny, flying pests don’t do any harm to houseplants in their mature, adult form, but fungus gnat larvae live in houseplant soil and feed on organic material. This not only robs the plant of nutrition, but the larvae may nibble on the plant’s roots as well. While they don’t cause much overall damage to an otherwise healthy plant, fungus gnats can be very irritating when they form cloud-like flocks around a plant’s foliage.

Overwatering in rich soil encourages fungus gnats, and they can be notoriously difficult to eradicate. Reducing watering so the top 1-2 inches of soil can dry out is the first step, but it is often best to completely repot an infested plant. The roots should be rinsed carefully to remove any lingering larvae, and if the same pot will be reused, it must be sterilized first. Use well-draining soil or water the plant from the bottom to make the soil less attractive to fungus gnats. You may also mix diatomaceous earth into the soil to deter these pests, add additional perlite to the soil to increase drainage, use a fine gravel top dressing, or apply Bt var. israelensis (Bti or H-14 strain) to organically kill fungus gnat larvae.

Mealybugs
These sap-sucking insects are no more than a half-inch long and have a white or light gray fluffy appearance. They are typically seen along the stems of houseplants, especially in the joints where foliage sprouts. As they suck the plant’s sap, the leaves wither and wilt. Yellowing leaves can also be another sign of a mealybug infestation, particularly if leaves are yellowing throughout the plant rather than just older bottom foliage.

When a houseplant is heavily infested with mealybugs, the fastest way to control the pests is to prune away infected foliage and discard of it carefully. If the infestation is light, however, the bugs can be deterred with a Neem oil spray or rubbing alcohol. Apply the alcohol directly to the pests with a cotton ball or swab to kill them.

Spider Mites
These pests can be very destructive to all houseplants and can be challenging to get rid of. The mites themselves are so tiny that they may not be noticeable even with a heavier infestation, but their webs on the undersides of foliage or stretching between stems will be easier to see. Leaves that show yellow stippling may also indicate a spider mite infestation.

Spider mites thrive in dry conditions, so keeping houseplants’ humidity high is a good way to deter them. Running a humidifier, frequent misting, grouping pots together, and sitting pots on water filled pebble tray are all helpful solutions. When the bugs are present, neem oil spray should be used weekly to remove them and keep them from returning. Alternatively, light cleaning with insecticidal soap is also an effective way to control spider mites.

Aphids
While better known for their outdoor infestations, aphids can also be a problem on indoor houseplants. They are tiny insects, no more than one-eighth of an inch in size and range from green or black to reddish or white. They are very plump insects and get that way as they suck sap from the plant, usually on the foliage or stems. The plant will gradually wilt as it is unable to stay firmly upright while the aphids drain its sap.

Aphids are easily dislodged with a blast of water, so a cleansing shower is a good way to remove many of these pests without any unnecessary chemicals. If the infestation is extreme, it may be necessary to wash the plant gently with an insecticidal soap to get rid of aphids. Neem oil spray can also be effective for controlling aphids on houseplants.

Scale
These insects have a hard, oval-shaped shell that gives them a tough, scale-like exterior as they line up on a plant’s stems in tight clusters, similar to barnacles on a boat’s hull. These pests suck sap from the plant, and then produce a sticky, honeydew residue that can coat the plant and lead to mildew or may attract additional pests.

Your first line of defense is to gently scrape scale bugs off a plant with your fingernail, taking care not to scratch or damage the already stressed plant. Dabbing the insects with swab soaked in rubbing alcohol or spraying with neem oil can also be effective.

Minimizing Houseplant Pests

No matter which pests may be a problem, it’s always best to avoid infestations altogether rather than try to control them after the insects have already made an appearance. To minimize the risk of bugs taking over your houseplants…

• Purchase new plants only from a reputable retailer, like Poor Boy’s Garden Center, that offers proper care to the plants and can offer support for any problems after purchase.
• Inspect new plants carefully before purchasing and avoid plants with signs of pests.
• Quarantine any new plant for at least a week to be sure it doesn’t have any unwanted guests, including outdoor summer plants that will overwinter as houseplants.
• Use high quality, well-drained potting soil for all houseplants, rather than garden soil that isn’t sterilized and can even harbor pests.
• Provide houseplants with optimum care so they are not stressed as stress can make them more susceptible to pest infestations.
• Sterilize all houseplant equipment regularly, including pots that will be reused, pruners and shears, and watering cans, to be sure no pests are carried between plants.
• Stay alert at all times for signs of possible insect infestations. The faster you are able to act, the easier it will be to control these unwanted guests.

It can be frustrating to find pests on your houseplants, but with careful monitoring and appropriate control measures, your plants will soon be pest-free.

What are your garden’s trouble spots? Do you need an evergreen hedge? A tall anchor plant at the back of a deep garden bed? How about an interesting groundcover? Perhaps your garden needs a medium-sized transition plant. Try a euonymus! This versatile plant does it all, and whatever your landscape needs, this family of plants probably includes your solution. Some are deciduous while others are evergreen, but all are easy to grow and adapt well to a variety of environments.

About Euonymus

With more than 175 varieties of Euonymus available, there is sure to be one to meet your landscaping needs and climate conditions. Evergreen types tend to prefer somewhat sheltered locations, while deciduous euonymus will thrive in full or part sun. Watering should be regular, with more frequent watering (1-2 times per week) in very dry conditions. Well-drained soil is best to prevent root-rot and while richer soil is ideal, euonymus can adapt to nearly any soil type. Pruning can help keep these shrubs compact and neat, and if left unchecked they may outgrow spaces and variegated leaves could revert to plain colors.

Euonymus Varieties in Autumn

In the fall, the burning bright colors of a deciduous euonymus are unmistakable and add rich autumn foliage to the landscape. The strawberry bush (E. americanus) burns bright yellow with scarlet red fruits with orange seeds. The spindle tree, (E. europaeus) has more red in its fall color and the berries are pink or red with white seeds. Probably one of the best known is the Winged Euonymus (E. alatus), often used as a deciduous screen, with unique “winged” twigs and bright red fall color. Choose from a number of different varieties with unique colors and varying mature heights.

The many members of E. japonicus provide solutions for evergreen hedges, edging plants and intermediate-sized shrubs. They range from 1-12′ tall. Some are green, while others have variegated yellow or silver leaf edges. Popular ‘Green Spire’ grows to 7′ tall but at only 1-2′ wide, it creates a narrow and easily maintained taller hedge ideal for screens and privacy. ‘Silver Princess’ grows only 3′ high and wide creates a beautiful silver-tinged border or is a great option for terraces or small bed areas.

For groundcovers, check out the prostrate varieties of E. fortunei such as ‘Coloratus’ (Purple-Leaf Winter Creeper) which turns dark purple in the fall or ‘Wolong Ghost’ with dark green leaves with white veins. There is even a dwarf groundcover, E. fortunei ‘Minimus’ which grows less than 6″ high!

Remember, many of these euonymus varieties add autumn beauty to your garden, so this is an excellent time to see them at their peak and choose which of these unique and stunning plants should be part of your landscape.

All containerized plants that are considered hardy in your zone can spend the winter outdoors, but you do need to take a little special care to keep them safe and comfortable as temperatures drop. Despite their hardiness, winter is still a challenging season, but it is possible to keep your container plants healthy until the days grow longer and warmer again.

Options to Overwinter Your Container Plants

• In the late summer or fall, removed the plant from its container and plant it in the ground while the soil is still warm. Another method is to bury the pot, with the plant in it, in the garden and remove the pot following spring. Both of these methods will help insulate the root system, preventing it from freezing solid and killing the root system.
• Place containerized plants in an unheated garage but along a heated wall. This is an excellent method for very large pots or porous pots that tend to break apart from the constant cycle of freezing and thawing, and so would not be very hardy if buried. For extra root protection and insulation, wrap the pots in plastic bubble wrap or wrap an old comforter or quilt around the pots.
• Group pots together along the sunny side of your house or shed. If this area is windy, create a windscreen with stakes and burlap. Place bales of straw or hay around the perimeter of the grouping up against the pots to further protect plants from cold winds. Fill in areas between pots with mulch, shredded leaves, grass clippings or hay for insulation. Lay evergreen branches or place a layer of mulch on top of the pots for additional protection.
• Use a cold frame covered with plastic or Reemay fabric to help control temperatures and reduce light as well, helping plants stay dormant in winter. It will still be necessary to use mulch, shredded leaves or hay around and in-between pots for insulation. Rodent control, such as Havahart traps, may be necessary when using this method. Another option for rodent control is Repels All. Sold in granules and a ready to use spray (hand spray) or a hose spray, depending on your needs.

Watering Container Plants in Winter

Make sure that plants go into the winter with moist soil so that there is water available to plant roots. Check soil moisture occasionally, never allowing it to dry completely. It is also a very good idea to spray needled and broadleaf evergreens with an anti-desiccant. This acts as a protective coating for plant foliage and stems as it helps them retain moisture.

With just a little care and forethought, you can easily prepare containers for winter without risking the plants and arrangements you have so carefully cultivated.

We’re certain you’ve heard it numerous times: fall is the best time to buy your Japanese maple. Have you come into the garden center to pick one? Did the varieties overwhelm you? Let us make it easier for you by explaining Japanese maple differences. Then, when you come in, you’ll know exactly what you want.

The species Japanese maple, Acer palmatum, moderately grows to a 20′ by 20′ multi-trunked tree. The leaves have 5-9 finely cut lobes giving them a more delicate look than other maples. Red spring leaves turn to green in the summer and blaze with yellow, orange and red in the fall. All do best with protection from drying winds and hot overhead afternoon sun. During their centuries of use in gardens around the world, gardeners have discovered and propagated those selections with unusual growth habits and bark patterns, as well as leaf color and shape. With hundreds of Japanese maple varieties available at garden centers, we feel a little simplification is in order.

• Leaf Shape
  The variation Dissectum or Laceleaf Japanese Maple has leaves are deeply cut and finely lobed giving a lace cutout look. These varieties generally grow best in shady locations as the leaves easily burn or scorch. The leaves of non-Dissectum varieties are much less lacy. They resemble the leaves of native maples but are smaller and more deeply cut.

• Leaf Color
  The leaf color of different Japanese maples also varies. Many have red spring growth changing to green in the summer. However, some retain the red through the growing season. Some varieties have variegated leaves with white, cream, gold or pink. Variegated leaves burn easily in the sun but can revert to all green in too much shade. Green leaves tolerate more sun than red. Autumn is when Japanese maples really put on a show with a riot of blazing colors.

• Tree Form
  Non-Dissectum varieties grow more quickly into upright forms. Some varieties remain less than 10′ tall but others can grow to 25′ tall by 20′ wide. Laceleaf maples slowly develop a weeping form approximately 8-10′ tall and 8-12′ wide. However, ‘Seiryu’ is an exception, growing into an upright form.

Now that you have identified a suitable planting location and the type of Japanese maple you prefer, come see us and check out what we have on hand. Autumn colors are blazing now so this is a great time to make your selection.