You know you have a problem if your fern fronds start looking funky sooner than that. In answer to your question dvk421 I believe that the fronds turn yellow when under or over watered. If the leaves turn yellow, you are drowning it. Asparagus plumosa ferns thrive in average room temperatures. I have to be careful or they will wrap themselves around the window blinds. Outdoors, they need protection from frost. They prefer rich, slightly acidic well-drained soil. They need bright indirect light, without full sun. It has delicate, wispy foliage that makes a lovely addition to floral arrangements. Turn the plant every few days toward the light. If there are yellowish fronds on a palm for more than three days, that is a sure sign that the palm has a nutrient deficiency. Cutting off old leaves will help maintain the plant’s aesthetic look. Asparagus ferns are not ferns at all, they belong to the asparagus family. An old frond will go from green to yellow to brown in just three days. It’s vital to water plumosa ferns regularly and mist them to keep humidity levels high. If the tips of your fern’s fronds turn brown (leaf burn), this is a sign of over fertilizing. Firm the compost with your thumbs. Happy autumn fern: Autumn fern with sunburn: Now, this browning due to sunburn isn’t to be confused with the normal shedding of leaves. Asparagus Fern (Asparagus seteceous plumosus) Plumosa Asparagus is not a true fern. In winter, only add enough water to keep the soil from completely drying out. Insufficient light will result in yellow needles that drop. Whole Plant Easily Wilts During Hot Seasons Be careful not to overfertilize as this is one of the most harmful things you can do. An easy-to-grow plant that tolerates changes in watering frequency and is very low maintenance. Whether or not you should trim your Asparagus Fern will depend on what you want to get from your plant, how well it’s been growing, the size of your plant and other factors. It will also encourage growth of new foliage. Though the “regular” asparagus fern is the most popular member of the family, there are others I like much better. Step 3 – Tease out matted roots and remove dying or dead roots.Leave the healthy ones. Asparagus plumosa ferns are easy-to-grow houseplants. I love how the leaves (phylloclades) are flat and the plant is layered. Step 4 – Take a new pot and put a piece of wire mesh in the bottom.Fill up the half of the pot with well-drained organic soil. 1. The ideal N-P-K ratio for ferns is a ratio of 10-10-10- or 15-15-15 (any similar ratio). Fertilizers with slow release are best. Only water when the soil is dry down one inch into the soil. My favorite is the Asparagus setaceus plumosa or plumosa fern. They produce large, tuberous roots that can become potbound quickly. The feathery, rich green foliage provide soft texture and a light, airy appearance. To care for your plumosa fern, grow it in partial shade and moist, well-drained soil. I hope this helps. Aged leaves turn yellow and brown so when you see one, it’s time to cut it off. I have an entirely different question now. Step 5 – Place the plant in the middle and gradually fill the surrounding space with potting mix. Trim off any dead leaves and if you have one that needs trimmed back to the soil, do so with sissors. Asparagus Fern, Plumosa Fern (Asparagus plumosus) Join the Club to Manage Your Garden Plant Details; Basic Care Instructions; Detailed Care Instructions; Features. I bought a plumosa fern yesterday and it looks healthy and every thing, I … Heart ferns will surely produce younger fronds so the old ones can finally go. Ferns usually retain their leaves for 1-2 years, and then the oldest leaves usually turn brown and die back. You see I have one in my bathroom above. If they are brown, you are not watering it everyday. Keep soil most from Spring to Autumn. 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