Your coral cactus (Euphorbia lactea 'Cristata') is folding its fan-shaped growth. This is typically caused by insufficient light or improper watering—not by pot size or lack of fertilizer.
This plant needs full, direct sun all day. A sunny windowsill is essential. Without it, the crested fans will curl and weaken.
Let the soil dry deeply—often a couple of weeks—before watering thoroughly. Both overwatering and underwatering cause root dieback and fan folding. Do not repot; a larger pot will hold too much moisture and lead to rot.
The kalanchoe you received is a tender perennial that must stay indoors in frost-prone climates. It likes bright light and needs the soil to dry about a quarter of the way down before watering. Avoid repotting while it's flowering.
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