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How Much Cold Can Dill Tolerate? (Explained)

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Dill is one species of plant that is resilient to adverse temperature conditions. Weather conditions play a very vital role in the growth of every plant.

However, the ideal temperature for a dill plant is about 70°F.

Also, dill is an annual herb and regrows after its complete life cycle. This makes it one of the most resilient and cold-hardy herbs out there.

Nevertheless, cultivators strive to know just how resilient their plant is.

So, how much cold can dill tolerate? Dill plants can tolerate temperatures that dip as low as 25°F. The reason is that they are extremely cold-hardy. However, cool temperatures that drop close to freezing are a risk for dill. The plant cannot survive temperatures that are below 25°F.

Can Dill Take Frost?

Although dill plants are cold-hardy and can survive very low temperatures, they are frost-sensitive, and the winter frost will kill the dill plant.

Dill is a biennial warm-season herb. As such, it is not resistant to frost. Dill is also not resistant to light breezes.

Not only is the dill plant not frost resistant, but temperatures that drop too close to be freezing also pose a serious threat to the survival of dill plants.

Dill plants grow well in full sunlight. As such, they need a lot of light and heat to thrive. That being the case, it is preferable to grow the plant to have full access to full sunlight.

The perfect soil temperature range for the dill plant is 60-70°F. If the soil temperatures are not ideal, the plant will not thrive. And if the temperatures are too low, the plant will wither.

As such, it is preferable to grow dill during frost-free seasons because as soon as it begins to get frosty and temperatures drop to less than 25°F, the dill seeds will not germinate, and the already grown plants will die.

Not only dill cannot survive frosts, but it is also not resistant to strong winds. Therefore, the dill must be protected from strong gusts of wind.

You can do this by planting hedges to filter the winds, cushion their effects, and tie climbing plants such as the dill to strong supports.

The dill plant is extremely sensitive to frost, so much so that temperatures that are not freezing but are just close to freezing will cause severe harm to the dill plants. The plant cannot survive temperatures lower than 25°F.

It is worthy of note that the dill plant can also be cultivated indoors. However, it is important to remember that the dill loves sunlight.

As such, to cultivate the plant indoors, it must be done where the plant is guaranteed to get enough sunlight. Anything below the plants’ ideal temperatures will make its leaves turn dull brown and wither.

Since the plant cannot tolerate frost, it is advisable to protect the newly planted dill seedlings with a frost blanket. And to harvest fall crops before a freeze.

How Cold-tolerant is Dill?

The dill plant is very cold resistant. All varieties of it are tolerant to cold temperatures, and it is considered one of the most cold-hardy herbs to have in one’s garden.

Ideally, dill is a warm-weather plant, and for the most productive yields and strong stems, it is best to grow dill in a temperate climate. The reason is that the dill plant favors warm temperatures and maximum sunlight.

That notwithstanding, the dill still manages to grow and spread even in cold temperatures, which are not ideal for it.

Even though the optimum temperature for the dill plant is around 70°F, it can withstand temperature dips going as low as 25°F, which is a lot lower than several other plants and herbs, most of which find it impossible to survive temperatures lower than 40°F.

As long as the temperatures remain above 25°F, the dill will grow unaffected. However, the soil temperature must remain at about 70°F. Otherwise, the plant will wither from the roots and die.

The dill is also heat sensitive and will bolt when the temperature gets too warm.

The dill can grow well in poor soil conditions, although better in well-drained Sandy or loamy soil.

How Cold is Too Cold for Herbs Outside?

The temperature for outdoor herbs should range from between 55-85°F or between 13°-29°C for best results.

Although most herbs can survive temperatures that dip as low as 40°F and even lower, some herbs cannot survive temperatures lower than 50°F.

Cold hardy herbs are more resistant to harm caused by low temperatures. However, herbs that aren’t cold-hardy will not survive cold temperatures.

The mint, rosemary, and parsley, for instance, are cold hardy enough that they can be kept outside and survive. But basil, on the other hand, is one of the herbs that will not survive the cold.

Conversely, some cold-hardy herbs will survive temperatures that dip below 25°F, but they will not grow.

Herbs like thyme, bay, and sage are resistant enough to survive outside in the cold, but it will stagnate their growth.

Although the temperatures vary for different herbs, especially as some herbs are more tender than others.

However, some herbs, especially non-perennial herbs, are more tender, temperatures of 25°F and lower will cause severe damage to most herbs and plants.

Normally, plants will survive being left outside only if suitable for cultivation in zones with lower temperatures than the current zone where the plants are being grown.

 Well-drained soil is preferable for herbs grown outside. The reason is that the soil acts as an insulator for the plants.

On the other hand, wet soil will act like an ice cube and freeze the plant. The water-logged roots will eventually rot, stalling the plant’s growth and ultimately killing it.

What Temperature Will Kill Dill?

You can plant the dill anywhere, and it can withstand both hot and cold temperatures.

However, despite its cold hardiness, the dill plant cannot survive temperatures that drop below 25°F. That is the killing temperature for dill.

Anything below the 25°F temperature mark is extremely harmful to the plant, and if left in those temperature conditions, it will not survive.

On the question of whether frosts can kill the dill, it can survive cold temperatures but not hard freezes.

Other than cold temperatures, the dill plant is also sensitive to heat. It has been observed that heat temperatures of 90°F upwards can cause the dill to seed and wither.

Bolting is also another downside to cultivating dill in high temperatures.

When dill plants are exposed to high temperatures, they will seed prematurely, making them unusable since only the stems and leaves of the dill are mostly used.

High temperatures and heat spells can cause bolting in dill plants due to a genuine attempt to produce seeds and reproduce before they wither and die.

Conclusion

The dill is an annual plant in the celery family Apiaceae. Dill is widely grown in Eurasia and is used for spicing and flavoring food.

Like other cold-hardy plants, Dill plants are very resistant to cold weather conditions. So even when these plants are affected by low temperatures, they don’t easily die except when extremely low temperatures.

The dill is affected by low temperatures only if the temperature dips as low as 25°F. Anything above that is not extreme enough to cause harm to dill plants just yet.

Although the dill plants thrive and grow best when exposed to sunlight, extremely high temperatures over 90°F aren’t best suited for the dill plants.

Also, the resilience of dill does not cover frost. Thus, even though the dill is cold hardy and can tolerate cold temperatures well, it succumbs to light breezes and frost.

Thus, it’s necessary to plant and harvest the dill when the winter frost is not a threat. This should be done during the spring when all danger of the winter frost has passed.

References

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