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	<title>5月の菜園 | 北海道 家庭菜園 小さな裏庭の物語　</title>
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	<title>5月の菜園 | 北海道 家庭菜園 小さな裏庭の物語　</title>
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		<title>【家庭菜園・気温チェック編】夏野菜の定植、いつにする？失敗しないための 3つの鉄則</title>
		<link>https://amanojakublog1238.com/sapporo-summer-vegetable-planting/</link>
					<comments>https://amanojakublog1238.com/sapporo-summer-vegetable-planting/#respond</comments>
		
		<dc:creator><![CDATA[amanojaku1238]]></dc:creator>
		<pubDate>Sat, 09 May 2026 04:06:02 +0000</pubDate>
				<category><![CDATA[家庭菜園]]></category>
		<category><![CDATA[5月の菜園]]></category>
		<category><![CDATA[ガーデニング]]></category>
		<category><![CDATA[北海道]]></category>
		<category><![CDATA[地温]]></category>
		<category><![CDATA[夏野菜]]></category>
		<category><![CDATA[定植]]></category>
		<category><![CDATA[最低気温]]></category>
		<category><![CDATA[札幌]]></category>
		<category><![CDATA[苗の植え付け]]></category>
		<guid isPermaLink="false">https://amanojakublog1238.com/?p=5058</guid>

					<description><![CDATA[ゴールデンウィークは　もう終わり。ホームセンターには立派な苗が並び、今すぐ植えたくなりますよね。でも、札幌の5月は「昼は夏、夜は冬」と言われるほど寒暖差が激しい時期。焦って植えてしまうと、寒さで苗がチリチリに焼けてしまう [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>ゴールデンウィークは　もう終わり。<br>ホームセンターには立派な苗が並び、今すぐ植えたくなりますよね。<br>でも、札幌の5月は<strong>「昼は夏、夜は冬」</strong>と言われるほど寒暖差が激しい時期。<br>焦って植えてしまうと、寒さで苗がチリチリに焼けてしまうことも…。</p>



<p>今回は、私が毎年徹底している「定植を決める気温のチェックポイント」をまとめました！</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-2" checked><label class="toc-title" for="toc-checkbox-2">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">「最低気温」が10℃を下回らないこと</a></li><li><a href="#toc2" tabindex="0">「地温」15℃を目指して準備する</a></li><li><a href="#toc3" tabindex="0">「外気浴」で苗を鍛える</a></li><li><a href="#toc4" tabindex="0">まとめ：札幌の定植ベストタイミングは？</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">「最低気温」が10℃を下回らないこと</span></h2>



<p>一番大切なのは、最高気温ではなく<strong>「最低気温」</strong>です。</p>



<ul class="wp-block-list">
<li><strong>目安：</strong>最低気温が10℃〜12℃以上で安定する。</li>



<li><strong>理由：</strong>夏野菜の多く（トマト、ナス、ピーマン等）は、10℃を下回ると成長が止まる「低温障害」を起こします。</li>
</ul>



<p>予報に「一桁」の数字があるうちは、まだ我慢のしどころです。</p>



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<h2 class="wp-block-heading"><span id="toc2">「地温」15℃を目指して準備する</span></h2>



<figure class="wp-block-image size-full is-resized"><img fetchpriority="high" decoding="async" width="800" height="437" src="https://amanojakublog1238.com/wp-content/uploads/2026/05/黒マルチを貼る.jpg" alt="" class="wp-image-5061" style="width:664px;height:auto" srcset="https://amanojakublog1238.com/wp-content/uploads/2026/05/黒マルチを貼る.jpg 800w, https://amanojakublog1238.com/wp-content/uploads/2026/05/黒マルチを貼る-300x164.jpg 300w, https://amanojakublog1238.com/wp-content/uploads/2026/05/黒マルチを貼る-768x420.jpg 768w" sizes="(max-width: 800px) 100vw, 800px" /></figure>



<p>気温が上がっても、土が冷たいと根は伸びてくれません。植える前の「土作り」が定植の成否を分けます。</p>



<p><strong>黒マルチの魔法</strong><br>定植の1週間前から黒マルチを張っておきましょう。<br>太陽の熱を閉じ込め、地温を15℃以上に高めてくれます。</p>



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<h2 class="wp-block-heading"><span id="toc3">「外気浴」で苗を鍛える</span></h2>



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<p>お店で買ってきたばかりの苗は、温室育ちの箱入り娘。<br>いきなり外に植えずに、数日間<strong>「順化（じゅんか）」</strong>をさせましょう。</p>



<ul class="wp-block-list">
<li>日中は日当たりの良い屋外に出す。</li>



<li>夕方には玄関や防風室へ取り込む。</li>
</ul>



<p>これを3〜4日繰り返すと、茎が太くなり、外の風に負けない丈夫な苗に仕上がります。</p>



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<h2 class="wp-block-heading"><span id="toc4">まとめ：札幌の定植ベストタイミングは？</span></h2>



<p>「5月20日〜末ごろ」が最も安全！</p>



<p>焦る気持ちを抑えて、じっくり苗を鍛えながら、最低気温が二桁になるのを待ちましょう。<br>それが結果的に、たくさんの収穫への近道になりますよ！</p>



<p>#家庭菜園 #夏野菜 #札幌の庭 #ガーデニング初心者 #定植時期</p>



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