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Do ferns need fertilizer to grow?
Feeding Fern Plants Most perennial ferns do not require fertilizer, however, can benefit from it. In fact, a 1/2-inch layer of aged compost applied in spring, covered by another inch of shredded wood mulch or straw mulch, can provide enough nutrients to maintain healthy fern plants while also helping to hold in moisture.
How do you fertilize Boston ferns in the summer?
In the spring and summer, Boston ferns need to be fertilized once a month. The proper Boston fern fertilizer to use in summer is a water soluble fertilizer mixed at half strength. The fertilizer should have an NPK ratio of 20-10-20. During the summer you can supplement the monthly Boston fern fertilizer with slow release fertilizers.
Do Bird鈥檚 nest ferns need fertilizer?
Bird鈥檚 nest ferns grow slowly, so they don鈥檛 need much fertilizer. In fact, overfertilizing is worse than under-fertilizing. Every three to four weeks during the growing season 鈥?spring and summer 鈥?apply a 20-10-20 fertilizer, diluted to half strength. Do not fertilize during the rest of the year.
How do you fix over fertilized ferns?
If the outer fronds or tips of the fronds turn brown, this is a sign of over fertilizing outdoor ferns. You can then try to flush the fertilizer from the soil with extra watering. Ferns like a lot of water and should be fine with this flushing, but if tips turn black, decrease the watering.