Garden Q&A: Yuck! My basil tastes very bitter (2024)

Tom Bruton| Florida Times-Union

Editor's note: Part of the following column written by one of the Duval County Extension Service master gardeners - who volunteer for the Times-Union to answer reader questions on gardening - contained uncredited information. Much of the section on bitter basil came from a Dec. 8, 2009, article, "How to stop your basil from turning bitter," by Heather Bliss on Bukisa, a how-to information website.

I have several basil plants growing in pots. The basil is thriving and growing very big. Some plants have begun to flower, but I have pinched the flowers off. Recently, my basil has begun to taste bitter almost inedible. Any suggestions as to why, and what I can do, if anything?

Basil can be a confusing plant. An essential to the culinary herb garden, basil must be properly pruned to maintain the best flavor.

To keep your basil tastiest, prune the blossoms from the end of each stem before the flowers dry out. Basil has a tendency to grow very bitter tasting leaves if the flowers are allowed to mature to seed. Overwatering or under watering your basil can also lead to bad tasting leaves.

When cutting the leaves, stems and flowers, do not cut more than one-third of the plant's foliage. Removing a large amount of the plant can cause poor function and stunted growth. Properly pruning your basil is essential to keeping it healthy and tasty

Following a good deal of rain last week, blobs of brown, white and yellow foam-like stuff seem to be "growing" on the mulch around my shrubs. What are they, and how can I get rid of them?

These fungal-like growths are known as slime molds. They are not parasitic and, therefore, do not cause disease. They get their nutrients from bacteria and small bits of organic matter, which is why it is common to see them growing on mulch.

One particular slime mold, aptly named "dog vomit slime mold," Fuligo septica, is often the subject of primary concern. The initial bubbling or slimy vegetative stage may quickly transform into the reproductive stage, producing masses of brownish-black powdery spores within the ofttimes crusty exterior.

Although slime molds may grow onto nearby plants, they do not usually cover enough of the plant's surface to smother and cause harm to the plant. There is no way to get rid of slime molds, other than removal of the mulch or other organic matter on which they are feeding. After several days (especially dry days), slime molds will usually become less noticeable.

When rainfall is abundant, you may see slime molds in your lawn. The mold often appears as gray, yellow, pink or purple fungal growth on the surface of the grass blades.

Slime molds are not really disease-causing organisms at all. They don't do any damage to the grass. They are just primitive fungi that live in the soil. When the weather is moist and warm, the fungi send their reproductive growth, flowing up and over anything at ground level, including grass plants.

Because no harm is done to the grass, no fungicides are recommended. If the color or the density of the fungi is objectionable, just remove the fungi by mowing or sweeping, or hosing the grass with a strong stream of water.

I want to grow some hot peppers this fall. Do you have any suggestions on varieties?

Jalapeno, Centella, Compadre, Don Pedro, Mango and Tormenta are a few that you can try. For specialty hot peppers, you could try habanero, Infierno, Mesilla, San Arno and Camino Real. Planting dates for this area are mid August or February and March.

Pepper heat is measured in Scoville units. Habaneros average 259,000 Scovilles. In comparison, jalapenos rank 2,500 to 10,000 Scovilles, depending on the variety. Just as a comparison, the bhut jolokia is a chili pepper generally recognized as one of the hottest in the world. It has a Scoville rating of around 1,000,000.

Tom Bruton is a master gardener with the Duval County Extension Service and the University of Florida/IFAS.

Garden Q&A: Yuck! My basil tastes very bitter (2024)

FAQs

Garden Q&A: Yuck! My basil tastes very bitter? ›

Basil has a tendency to grow very bitter tasting leaves if the flowers are allowed to mature to seed. Overwatering or under watering your basil can also lead to bad tasting leaves.

How to remove bitterness from basil? ›

Actually the best way to get rid of the bitterness starts at the plant: cut out the flowers and buds as they form. It makes a huge difference. I noticed the smell and taste of my basil changed when the green beginning of the flowers started.

How do you make basil more flavorful? ›

How to grow flavoursome basil
  1. Maintain a consistent daytime temperature of up to 25°C.
  2. Use UV-B lighting and glass filters.
  3. Choose the right basil varieties for your growing conditions and season.
  4. Keep crops well hydrated.
  5. Induce stress responses with sprays of salicylic acid, but don't limit essential nutrients or water.

How to counteract basil? ›

Pesto – This green sauce usually consists of basil, pine nuts, garlic, olive oil, and Parmesan cheese. If you find the basil flavor is too strong, try replacing half of the basil with spinach. You can also substitute walnuts or almonds for pine nuts.

Are basil stems bitter? ›

All agreed that the tender, thinner, younger stems tasted clean and sweet, comparable to the leaves. However, as tasters reached thicker, older portions of stem, particularly the lower portion of the central stem, bitter flavors began to dominate.

What cancels bitter taste? ›

Sweetness: From sugar, honey, fruits or otherwise, sweetness will counteract bitter and sour flavours. It can also be used to cut down the heat of a particularly spicy meal. Saltiness: Salt plays two very important roles in flavouring a dish. Firstly, it balances against bitterness.

How do you tone down bitter taste? ›

The Fix: Balance bitter flavors by introducing something salty, sweet, or sour. For naturally bitter foods such as kale, you can soften the flavor by add a lemony vinaigrette, Parmesan cheese, and pomegranate seeds. You can also elevate kale by tossing it olive oil and salt, then roasting it in the oven until crispy.

What makes basil taste good? ›

There are many compounds that make up the characteristic flavor of basil, but we will focus on four compounds that contribute the most: eugenol, methyl chavicol, 1,8 cineole, and linalool (Fig. 1).

What makes basil happy? ›

Basil prefers moist soil – not too wet and not too dry. You want the soil to be damp, not drenched. Although basil loves warm weather, a hot midday sun can be rather harsh. If you see wilting only during the peak hours for summer temperatures, you may need to add light shade over your basil plant.

How do you perk up basil? ›

Fill a large bowl with ice and cold water. Remove any bruised or blackened leaves, and then submerge the wilted herbs, stems and all, into the ice bath. The cold water will shock the herbs back to life. Depending on the herb and just how wilted it is, this could take as little as 15 minutes to as long as an hour.

What are the enemies of basil? ›

The most common pests of basil are Japanese beetles, slugs and aphids. Japanese beetles are usually present for about a month in the summer. They skeletonize the foliage (i.e., eat the leaf blades, but do not consume the larger veins of the leaves).

Does Epsom salt help basil? ›

To correct magnesium deficiency in container-grown basil, growers can drench plants with magnesium sulfate (MgSO4) or Epsom salts at a 1-2 pounds per 100 gallon rate and switch to a fertilizer containing more magnesium.

How to fix bitter basil pesto? ›

Anything sugary will work: granulated white sugar, honey, fruit juices, even sweet dessert wines. Acid in the form of vinegar or citrus juices can make a pesto taste less bitter and could even enhance the flavour of the sauce at the same time.

How to stop basil from tasting bitter? ›

To keep your basil tastiest, prune the blossoms from the end of each stem before the flowers dry out. Basil has a tendency to grow very bitter tasting leaves if the flowers are allowed to mature to seed. Overwatering or under watering your basil can also lead to bad tasting leaves.

Is bitter basil edible? ›

Bitter Tasting Basil Leaves

It can be used either fresh or dried, although most people agree that dried basil doesn't hold a candle to fresh basil.

Why is my basil sauce bitter? ›

If your pesto tastes more bitter than it did a day or two earlier, the most likely explanation is that the herbs have started to oxidise. Prolonged exposure to air turns herbs bitter and may be accompanied by the telltale sign that the colour of the sauce looks more brown or grey than it did before.

How to make basil not bitter? ›

To keep your basil tastiest, prune the blossoms from the end of each stem before the flowers dry out. Basil has a tendency to grow very bitter tasting leaves if the flowers are allowed to mature to seed. Overwatering or under watering your basil can also lead to bad tasting leaves.

How do you take the bitterness out of herbs? ›

Squeeze in some vinegar or lemon juice.

Try squeezing some fresh Make-Lemon-Juice|lemon juice]] or adding a spoonful of vinegar to bitter dishes to neutralize the flavor a bit.

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