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How Do I Plant Rosemary Seed?

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  • Written By: Amanda R. Bell
  • Edited By: R. Halprin
  • Last Modified Date: 07 November 2016
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Rosemary seed needs to be started indoors before it is moved outside to ensure the best growth. Small plant starting discs and an indoor container, often sold as a set, can be used to initially plant rosemary seed. Once the plant has a sturdy root system, you can move it to a larger pot or outside in a garden.

Purchasing quality rosemary seed is essential to growing a healthy plant. In most instances, rosemary grows best when propagated from an established plant because lesser quality seeds may not grow well. You will also need to purchase a seed starting kit with a container, lid, and starting discs.

Most starting discs are flat and dry when purchased. To revive them, slowly pour lukewarm water directly over each disc until it doubles in size. Most of the time the kit will tell you approximately how much water is needed. Once the disc absorbs all of the water, typically after five minutes, gently remove the netting from the top of the disc to expose the soil.

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Gently fluff the soil with a toothpick or small fork to loosen it. Then, create a small indentation in the center of the disc and place a rosemary seed or two in the hole; gently cover it with soil from the disc. Each disc will produce one rosemary plant. As a rosemary seed will not always grow properly, or at all, it is typically a good idea to plant seeds in a few more starter discs than you actually need. This will allow you to choose the healthiest, sturdiest plants.

Once all of the discs are ready, put the cover over the container and place the kit in a warm room that receives indirect sunlight. Avoid putting the seedlings in direct sunlight because this can cause the rosemary seed to morph or not grow at all. Make sure the discs stay lightly damp, but do not soak them. Once at least one disc has a sprout, set the cover at an angle to allow some air movement while still keeping the seedlings covered. Depending on the variety of rosemary seed planted, this can take anywhere from one to three weeks.

After each rosemary seed has sprouted, remove the cover entirely and allow the plant to grow in the container. As before, keep the soil damp but not soaked. Once there are visible roots on the outside of the disc, usually after three to five weeks, move the plant to another container or a garden. When planting the seedlings, remove the netting from underneath the disc and very gently split the bottom to lose the roots. Place the rosemary plant in high quality soil in a larger container or garden that receives full to partial sun and tend to the plant as needed.

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Rotergirl
Post 2

I had pretty good luck with rosemary seeds. The little soil discs, or Jiffy-Seven cubes, are great for starting seeds.

Something to remember is that rosemary is a distant cousin of the pine tree, and they do look like little trees when they are fully mature. I have known people who bought a rosemary "tree" that had a nice shape, decorated it and put it on the porch for Christmas!

It's nice to have something around that is a multipurpose plant. It's a great cooking herb and it's also decorative. What more can you ask for?

Pippinwhite
Post 1

I don't think I've ever seen rosemary seed. I have seen mostly rosemary plants, which also need to be planted in a roomy container if you're going to plant them in the yard and not keep them in the pot. But, if you do keep them in the pot, you may need to re-pot every so often, if the plant becomes root-bound.

It's not difficult to re-pot. Usually, all you have to do is to get a larger container, then carefully remove the plant from the original pot, put it in the bigger container, and pack soil around the rootball. Water, return the plant to its environment, and you should be good to go for another year or two, at least.

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