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Book 29, Question 8 · Video

Why does the last frost date matter to gardeners?

Video · 1:51 · Crafty Clover explains, from A Million Whys Book 29

Frost can kill tender plants like tomatoes, peppers, and basil. The last frost date is the average date after which frost is unlikely in your area. In much of southern Ontario, that's around mid to late May. Gardeners wait until after this date to put out tender plants, or they cover them when frost is predicted. Weather is not always average, so watch forecasts too.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does the last frost date matter to gardeners?

The Big Idea

Frost can harm tender plants! That's why gardeners watch the calendar. Why does the last frost date matter?

Frost Danger

Step one: Frost Danger. Frost can kill tender plants like tomatoes, peppers, and basil. Their leaves can freeze in just one cold night.

The Date

Step two: The Date. The last frost date is the average date after which frost is unlikely in your area. In much of southern Ontario, that's around mid to late May.

Plan Ahead

Step three: Plan Ahead. Gardeners wait until after this date to put out tender plants, or cover them when frost is predicted. Weather is not always average, so watch the forecast too.

A Closer Look

Let's take a closer look! Ice crystals. Need warmth. Handle a chill. Check it.

Quick Facts

Quick facts! Some plants, like peas and spinach, can handle a light frost. Late May in southern Ontario. Basil hates the cold. Check the forecast.

Think Like a Scientist

Now, think like a scientist! With a grown-up, look up your area's last frost date. Find it on a calendar. Mark it with a star. List plants to wait for. How many weeks away is it?

Outro

Frost can kill tender plants like tomatoes, peppers, and basil. The last frost date is the average date after which frost is unlikely, so gardeners wait until then or cover plants, and they watch the forecast too. Science is amazing! Remember, every big discovery starts with a small question. Keep looking, keep learning, and keep asking why! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this