Posted 3w ago by @FierySkyplant

Please help Greg
We bought Greg from a local flower market last October. This app identified him as Euphorbia Posinii though we may be wrong. As much as we paid attention to he has been relatively ok apart from occasional falling leaves. Things rapidly started to change around the last few weeks when the branches? started to deform with noticeably more falling leaves. The first image was back in October. The second in November or December. The last two are as of now. We suspect the room temperature so just this week covered all his branches with plastic bags though this may be making the situation worse. We have no knowledge on how to take good care of him aside from the shop owner telling us he needs moderate sunlight and once a month watering. All the other plants we bought at the markets are doing extremely well aside from him. Please help.
Best Answer
This is a Euphorbia. I have the cristata. They like bright light, fast draining soil, low humidity and infrequent waterings.

Your images show white spots. That’s disease and if an alcohol-dipped ear swab doesn’t take it away, snip it off and allow it to scab over. The black spots tell me it is overwatered. These tolerate dry soil and should not be exposed to high humidity unless you plan to skip waterings or provide infrequent waterings.

At this point, I would remove the plant from the soil and clear away all soil to inspect roots. Toss the soil and sanitize the pot. These like shallow pots with drainage and Sandy soil with a bit of grit to help water flow through the soil.

Trim away dead or mushy roots and repot in fresh soil mix then place it close to a bright light and refrain from watering it. Your plant will lose leaves as it tries to re-acclimate and when you do water, make sure it is warm distilled water and use very little in an attempt to not inhibit root rot. Do this for about one month and see if it recovers. This plant only needs water once every two weeks if it’s in very bright light and it should be measured out before being poured into the pot along the rim and never close to the plant base.
This is how he looks now.
@FierySkyplant Welcome πŸ€— to Greg, Hosono! I am getting Vladimir to help you. Also when you post something hashtag it like #SucculentSquad #Euphorbia
@vvvelo is there any way you can please help?

How to Grow and Care

Euphorbias are very easy to care for. These plants require a little pampering to become established, but once they are, they are self-sufficient. More die from too much care and watering than from neglect. Euphorbias need well-draining soil and lots of sunlight. They are not particular about soil pH, but they cannot tolerate wet soil. Unlike most succulents, Euphorbia does not handle long periods of drought well. It may need weekly watering during the summer. Water whenever the soil is dry several inches below the surface. Water deeply, but don't let them sit in wet soil, which can cause root rot. Add some organic matter or fertilizer to the planting hole. Feed with a half-strength fertilizer monthly if you are growing them in containers or your soil is poor.

These succulents can be grown from seed, but they can be difficult to germinate (or even find). They are usually propagated by cuttings. This can be tricky because of the exuding sap. Rooting hormone is recommended with Euphorbias. They tend to grow problem-free, but there are a few pests and diseases to be alert for.
@FierySkyplant it most definitely is a Euphorbia poissonii 'Variegata'
@vvvelo here is the plant card.
@KikiGoldblatt Thank you for the quick response and also tips on how to ask questions here. Will do further research online.
Thank you @FitSedum for your tips as well. I spent the weekend following the instructions and found out that majority of the branches as well of part of the root were mushy, thus cut/shaved off. He looks so much smaller now but I think this is for the better. Will share some photos here and again update in a month or so if things change. Thank you all for the support : )