How do you kill ferns on a canary island date palm tree?

To kill ferns on a Canary Island date palm tree, you can use a targeted approach with herbicides containing glyphosate or triclopyr. Carefully apply the herbicide directly to the fern leaves, ensuring to avoid contact with the palm tree to prevent damage. Alternatively, manually remove the ferns by pulling them out, making sure to remove the roots to prevent regrowth. Regular maintenance and monitoring will help keep ferns from returning.