Top 10 Questions About Garden Problems


Questions on
gardening abound here at Gardening
Know How
. It’s our job, and our passion, to help answer those to the best
of our knowledge. Plant issues
in the garden are inevitable, regardless of how long you’ve been growing them.
Even we have to fight pests, diseases, and other growing troubles. As you can
imagine questions about problems in
the garden
are popular. Here are the 10 most commonly asked.

1. What do I do when the plant turns brown?

There are probably dozens of factors, but a few simple
situations should be addressed. If the tips or edges
of leaves are turning brown
, the plant may be overfertilized. Brown leaves
beginning at the tips and edges may indicate that a plant that isn’t receiving
enough water, especially during the heat of summer. Brown splotches, spots, or streaks
may be a sign of a fungal or viral disease, and some pests can also cause
browning of leaves. Root rot, generally caused by overwatering or poorly
drained soil, can cause the entire plant to turn brown and soft.

2. What causes leaves to turn yellow?

It’s normal for a few older leaves to turn yellow, but a lot
of yellow leaves are a sign that something isn’t right. Yellow
leaves
may be caused by excessive sunlight, but leaves can also look faded
or yellow in insufficient light. Too much or too little water can cause leaves
to turn yellow, as can too much (or too little) fertilizer. Check closely for
tiny, sap-sucking pests like aphids or mites. Root rot and other fungal
diseases, often caused by overwatering, can cause plants to turn yellow. Indoor
plants may simply need a larger container.

3. Why do plants produce more leaves than flowers?

Too much fertilizer, particularly high-nitrogen
fertilizer
, can promote a lush, bushy plant with no flowers. Be careful not
to kill your plant with kindness, and keep in mind that too little fertilizer
is better than too much. Other factors that prevent a plant from flowering may
include lack of sunlight, or conversely, too much hot, afternoon sunlight. Be
sure plants are properly protected if your winters are cold, as cold weather
can kill buds. Keep in mind that many plants rarely bloom during the first
year, when the energy is focused on developing healthy roots.

4. What to do about black dust on plant leaves?

If you notice black, sooty-looking
dust on plant leaves, your plant is likely afflicted with a fungus known as “sooty
mold
.”  The
presence of sooty mold generally won’t kill the plant, although a thick layer
can hinder photosynthesis by blocking sunlight. Sooty mold is usually fostered
by sap-sucking insects such as aphids, scale, leafhoppers, mealybugs, or
whiteflies, which leave behind a sweet liquid known as “honeydew” on the
leaves. The sweet stuff creates nourishment for fungi to grown. Insecticidal
soap or horticultural oil usually keeps honeydew-excreting pests in check. 

5. Will my garden come back after hail damage?

Whether
a plant comes back after a hailstorm
depends on several factors, such as
the time of year, type and maturity of the plant, and size of the hailstones. A
hailstorm that occurs in spring can hammer seedlings to the point of no return,
but a healthy plant damaged by a storm later in the season may rebound. If you
think there’s a chance a plant will survive, give it a little extra TLC. Remove
damaged growth and fertilize lightly after the storm. Water regularly and
provide a layer of mulch to help the damaged plant survive the winter.

6. What is the yellow looking, foamy blob in my garden?

That weird blob in
your garden is slime mold, often known as “dog vomit” for obvious reasons. The slimy mass, which
typically shows up on wood mulch, is harmless and promotes the healthy, natural
decomposition of the mulch. If you leave it alone, it will eventually morph
from bright yellow or orange slime to a crusty, bluish or gray substance that
soon breaks down into a brown powder. If the weird appearance bothers you,
scrape the stuff into the trash or toss it into your compost bin.  

7. What to do about plants that turn red?

Consider
environmental conditions when plants turn red. Toxins in the soil, such as de-icer,
fertilizer, or heavy metals may be the problem. Reddening may be caused by poor
drainage or soil compaction, which can prevent the roots from getting enough
oxygen. A soil test is a good idea, as most tests provide information about
soil pH, nutrient levels, and possible soil contamination. Excessive sunlight
and heat can cause plants to turn red, especially young plants that aren’t
fully developed. Some plants may turn red in response to cold temperatures.

8. How do you treat powdery mildew?

You may not be able
to get rid of powdery mildew, but you can take steps to keep it from
getting out of control. Always water at the base of the plant and keep foliage
as dry as possible. Prune, if necessary, to improve air circulation, which will
help by reducing humidity. Remove infected leaves and keep the area around the
plant free of debris. Go easy on fertilizer in late summer, especially
high-nitrogen fertilizer. Fungicide may help slow powdery mildew when applied
every seven to fourteen days throughout the growing season, although the fungus
is resistant to some fungicides.

9. Can frost damaged plants be saved?

A plant’s ability to survive frost
or cold damage
depends on climate, winter protection, and the type and
hardiness of the plant. Many plants can rebound from winter-long freezes, while
others will be nipped at the first hint of cold weather in autumn. Water
lightly if you think a plant is damaged. Be patient and don’t take any other
action if you aren’t sure the plant is dead, because many plants won’t show signs
of life until spring. If you see green growth, prune and fertilize lightly to
support the plant as it recovers.

10. What is bolting and how is it caused?

Many
vegetables bolt
, including cool weather veggies such as spinach, leeks,
onions, celery, carrots, and lettuce, as well as cruciferous vegetables such as
cabbage, turnips, and collards. Bolting simply means that the plant starts to
flower by rapidly sending up stalks in response to longer days and/or higher
temperatures. When a plant bolts, growth slows, and the plant’s energy is
focused on producing seeds. Quality is significantly diminished, and the
vegetables are usually tough, woody, and bitter.

We all have questions now and then, whether long-time
gardeners or those just starting out. So if you have a gardening question, get a
gardening answer
. We’re always here to help.

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