Let the top 1-inch of growing media dry out before watering thoroughly again. Allow the soil to dry out between waterings, keeping it on the drier side overall.To increase the relative humidity directly around your plants, you can keep them in a pebble tray to maintain high humidity and periodically mist the plant as well. Relative humidityĭue to their Mediterranean origin, rosemary likes higher relative humidity since they were used to really humid air because of the sea. ![]() Adequate light is necessary for photosynthesis – the process of converting carbon dioxide and water into sugar the plants can use for food. If your plants are struggling with lack of sunlight they will begin to look wiry or leggy. Rosemary needs a full sun (south-facing window) location that receives a minimum of 6 to 8 hours of direct light a day or supplementation with a grow light. It’s best if nighttime temperatures drop slightly too, to mimic the change naturally experienced outdoors after sunset. Rosemary plants like ambient temperatures on the cooler side, optimally between 60 and 65℉ during the day but they will survive indoors when temps are between 55 and 80℉. This means providing the appropriate sunlight exposure, ambient temperature, and relative humidity to promote healthy plant growth and the best tasting foliage. Most indoor plants prefer warm, sunny locations and thrive when given optimum conditions. The environmental conditions (temperature, lighting, and humidity) in most homes are well suited for herbs, rosemary included. Following the same method as transplanting new plants, or repotting plants, fill your container(s) with pre-moistened growing media and carefully plant newly rooted cuttings in the substrate. Once the new roots have reached the desired length you can put them into containers.The cuttings that do not survive will be brown and shed needles. This could take upwards of 8 weeks, so be patient. Allow the cutting to grow until new roots form and reach a couple of inches long. Place the cut end of the stem in a glass or jar of water in a warm location away from direct sunlight.These junctions where the needles attached to the stem (known as nodes) are the spots where new roots will form. Using your fingers, strip all of the needles from the bottom 2 inches of the stem.Cut more than you ultimately want for new plants, in case some perish instead of rooting. Avoid the older stems that are brown and woody. You want to choose fresh growth from healthy stems these are the green, flexible ones on your rosemary plants. Take 5 to 6-inch stem cuttings just below a node.This limits variability that comes with starting new plants from seeds. Starting new plants from cuttings also results in new plants that are genetically identical, or clones, to the “mother” plant. ![]() Seeds have very low germination rates and seedlings struggle to establish, making it easier and less expensive to take softwood stem cuttings from existing specimens and propagate new plants. Rosemary is best propagated from stem cuttings versus trying to start new plants from seeds. Propagating rosemary stems in glass How to propagate stem cuttings It will be explained more in the coming sections, but it’s best to propagate new plants from cuttings instead of purchasing seed to start new plants. Plants: Plant material can either be outdoor plants that you’re bringing inside for the winter or new plants that you’re intending to grow. A terra cotta pot works best the porous sidewalls let water move through them, helping to dry out the growing media quicker. If the plant is getting taller than the pot is deep, it’s time to repot into a larger pot and do some root pruning to keep the plant from getting any taller. Avoid using garden soil in your containers it is really heavy and compacts down, closing the pore space that can hold air and water in the root zone.Ĭontainers: Containers should be the same depth as the height of the plant. ![]() Or you could mix additional sand, perlite, or vermiculite into a commercial potting soil you purchase from the gardening center. Some people plant it in a growing mix formulated for succulents. ![]() Growing media: Rosemary likes its roots to be slightly dry so you need a growing media with really good drainage. SuppliesĪll you will need to grow rosemary indoors is the basics: growing media, containers, and plants. Now that you’ve got that little ditty in your head now too, let’s take some time to talk about everything you should know to grow rosemary indoors. Luckily for me, it’s been stuck in my head since I sat down to work on this article. Parsley, sage, rosemary, and…well, you know where I’m going with that.
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