![]() Feed the tree with a total of 1 cup of fertilizer for citrus trees. Once you spot new growth on your Grapefruit tree it is time to start applying a 21-0-0 citrus fertilizer. Fertilizing – All citrus trees require citrus tree fertilizer.Just make sure that the mulch or herbicide does not touch the trunk or any part of the tree as this can lead to retaining moisture that may lead to root rot. To prevent this you can mulch around the tree base using a systematic, contact herbicide to get rid of grass and weeds. Weeding – Weeds growing around the base of your grapefruit tree can be competition for water and nutrients.Also be sure to remove any suckers (small green upstart branches) that begin to grow below the graft, as they suck out the much needed nutrients that your citrus tree requires to grow and start bearing fruits. To maintain the overall health of your tree just prune the diseased, damaged, dying, or dead branches from the tree. Pruning – like most citrus trees, the Rio Red Grapefruit tree does not require elaborate pruning.Watering should be gradually decreased to every seven to ten days, except during dry periods when your grapefruit tree will require additional water. Newly planted Rio Red Grapefruit trees should be watered every three days during its first two weeks after planting. Watering – growing citrus trees need more water compared to already established ones.It the temperature drops to below freezing for an extended period of time, place a heat lamp or incandescent bulb under the cover to prevent the accumulation of extended frost. You can protect your tree from possible damage from cold temperatures by draping a tarp or blanket over it and tying down the corners so the wind will not blow the cover away. Furthermore, keep in mind that even if you are located in an area that offers a warm climate, there are still occasional cold snaps and you may need to protect your tree from frost or freezes. It is ideal to plant citrus trees like Grapefruit trees on the southernmost side of your property as this location offers the most sun and help with protection during the winter. ![]() You can also plant it in a pot in USDA growing zones 4 to 8. Cold and Winter Protection – A Rio Red Grapefruit tree loves full sunshine and will grow well in USDA growing zones 9 to 11.Make sure to plant your tree at least 12 feet away from buildings, sidewalks, and driveways to allow it ample space to grow. However, it will grow into a vigorous tree that can have a wide diameter up to 25 feet. Planting Location – Your Grapefruit Tree will just be a few feet tall when it arrives and the root system will not yet be fully developed.When planted in a poor draining, heavy clay or salty soil, fruit production will be reduced and plant lifespan will be shortened. Growing grapefruit Trees are partial to well-draining, loamy (or sandy) soil. ![]() Make sure to prepare the planting area before planting and amend the soil if needed. ![]()
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