Question: why is my cyca yellowed?
Hi, I have a cycas bought last January, small in a pot of 15 cm circumference, I immediately transplanted it into a large vase + about 32 cm ... watering 1/2 times a week, I put universal earth + a little of manure on the bottom, drainage with expanded clay, after a few days I saw some needles discolour and turn yellow, I thought I had watered too much so I reduced to 1 once a week, the exposure is from 7 full sun until About 13, to date the leaves are all yellow with some very light green needles, 10 days ago I put 2 cm of iron sulfate under the ground, and I cut 3 leaves, among other things I tied them with the wire green special because if I leave them free they tend to widen almost at a table, I don't know if it's dying ... I live in Ardea prov. Rm 1 km from the sea, the climate is warm ... what should I do?
Yellowed Cycas: Answer: cyca revoluta
the cycas are plants of very ancient origin, widespread in much of Asia, Africa and Australia; in particular, one of the most widespread is cycas revoluta, of Asian origin. Despite its appearance, it is not a real palm tree, but more correctly than a cicadaceae; the large fronds insert themselves on a stocky and broad stem, which is very slowly formed over the years.
They are resistant plants, despite their exotic appearance, which tend to develop well even in not entirely ideal conditions. Generally they should be grown in the sun, or in any case in a place where they can enjoy at least a few hours of direct sunlight, in pots or in the open ground, but always with a well-drained soil, without water stagnation; they do not require large quantities of fertilizer, but simply a liquid fertilizer, once a month, during the summer. They do not fear frost too much, and specimens from long to dwelling can withstand temperatures of some degrees below zero.
That said, cycads can still develop vigorously even in semi-shaded locations, with fairly cold winter weather; the thing they least tolerate are the excesses of watering. A cycas needs water sporadically, only when the ground is decidedly dry; it is advisable to avoid excesses in any way, always checking that the soil does not remain wet; for potted specimens the thing is easier, it is still useful to always check not to leave water in the saucer.
It is not possible to establish a rule for watering, the variables are too many; it is enough to intervene when the ground is decidedly dry; and above all it is important to cultivate them in a very well drained soil, produced by mixing with the universal soil of perlite or clay, so as to allow the water to flow easily. Thus, leaf yellowing could be due to excess watering.
Iron sulphate is also not conclusive when the reasons for the yellowing are not known: it is a soothing fertilizer, which only works if the yellowing is due to a lack of iron absorption, which is very unlikely in a fresh soil. Perhaps your cycas suffered damage to the root system during repotting, or perhaps the stress was excessive. Consider that the cycads grown in pots show a particular preference for decidedly very small containers, only a few centimeters wider than the diameter of the stem. The manure may have been too much, and to have basically burned the roots, in which case you should remove the cycas from the pot, take back the old jar, fill it with soil and sand and lose the cycad, hoping it will recover.