They usually start to form within a few days after the seed leaves have opened.īaby broccoli seedlings germinating Broccoli Seedling Care Tips Those are called “seed leaves”, and they look like two fat hearts on either side of the stem.Īll of the ones that grow after that are called the “true leaves”, and those look like tiny broccoli leaves. When they first sprout, baby broccoli seedlings will have only two leaves. If you planted them indoors, and you want them to germinate faster, put the trays on a heat mat to speed things up. It takes about 5-10 days for the seedlings to start popping out of the soil, depending on how warm it is. Broccoli Germination Timeįor the most part, growing broccoli from seed is fairly quick. Then place it in a warm location, or put it on top of a heat mat. Step 6: Cover the tray – Place the plastic lid on the top of the tray to ensure the soil doesn’t dry out during germination. Dump out any that hasn’t be absorbed after 20 minutes. Simply pour water into the tray, and allow the soil to soak it up from the bottom. Step 5: Add water – It’s best to water your trays from the bottom, so you don’t disturb the soil or displace the seeds. Since they are so small, broccoli seeds should only be planted about 1/8″ – 1/4″ deep. Step 4: Cover the seeds – Lightly cover the seeds, and gently press the soil down to ensure it comes into contact with the seeds. I find it easier to make the holes first. Or place the seed on top, and then gently press it into the soil. Step 3: Plant your seeds – You can either make a shallow hole in the soil, and drop the seed into it. Otherwise, if they are old, then you may want to plant 2-3 per hole. Step 2: Decide how many seeds to plant – If you’re using brand new seeds, then you can just plant one per hole. Step 1: Fill the seed trays – Fill your seedling tray with a high quality seed starting mix, or use pre-moistened peat pellets if you prefer.
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