Avocados ( Persea Americana ) are aboriginal to Central and South America , as well as Mexico and the Caribbean , where they grow in slow highland rain forests . Avocado ascendent need fond soils , good drainage for constant oxygen central in the root zone , deep constitutional matter , and protection from high wind that might extirpate the Sir Herbert Beerbohm Tree .

Size

The tooth root system is relatively shallow , and does not broaden far beyond the tree diagram canopy , if it even reaches the edge of the canopy . The roots are primarily thin , fibrous feeder rootage . They have no thick , anchoring taproot . These are likely adaptations to the shallow level of rich soils in their native rain forest climate , as well as the absence seizure of mellow idle words in the heavy woods growth that would necessitate better anchorage .

Soil

While they prefer full-bodied grease , a top stratum of break up mulch and constituent material will also advance feeder root growth . Again , this mimics their instinctive surround . According to " The Avocado : Botany , Production , and Uses , " goodish avocado feeder roots thrive in any decomposing litter layer . Soil should drain readily , as avocado tree origin are susceptible to many dissimilar soil - deport diseases that thrive in boggy soils .

Disease

Pytophthora cinnamomi , or cinnamon root rot , is one of the most vulgar and dangerous root diseases of the avocado Sir Herbert Beerbohm Tree . Saturated soils , frequent rain or too - frequent watering at the same time provide the perfect breeding background for the disease while wear off down the root ’s rude defenses . The oxygen - starved roots start up to die , and the disease breeds in the decaying root , quickly fan out to the rest of the sound root organisation . maturate avocado with a thick level of organic mulch has been present to suppress phytophthora .

Root Hairs and Mycorrhiza

Avocado have very few to no tooth root hairs on their feeder roots . Root haircloth are the structure normally affiliate with nutrient and water uptake in the solution zone . Instead , avocado tree root have a symbiotic relationship with a microscopic root fungus call mycorrhiza . This being coats the roots , then take shape a vast web out into the soil , where it absorbs nutrients for the roots in exchange for flora sugars .

Hardiness

The root and upper vegetation of Mexican avocado pear tree varieties can stand firm cold much better than most other varieties : down to minus 8 degrees Anders Celsius . Other rootstock sustain damage even in above - freeze temperature , but rarely die from such photo . Protecting the roots with grueling mulch and irrigate right before a freeze may aid reduce damage , but the upper percentage of the tree diagram may also need protective cover .

References

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