I would defiantly wait for late Spring, transplanting a newly purchased plant is never a good idea, plants need to acclimate to it's new environment & lighting. You could put the nursery pots into pretty decorative pots and just remove the pots when watering so that the water will drain in your sink. They are both healthy looking

I am with dbarron. I routinely repot all new plants when I obtain them. Personally, I don't think the timing matters all that much and the advantages of repotting into a better, more durable and faster draining soil mix greatly outweigh any minor setbacks that come from repotting. I have never had a plant fail from an ill timed (if there even is such a thing) repotting but I have had plants decline rapidly if left untouched in their existing soil mix.

I've learned with a deft hand and some tricks (like swirling plant in a pot of slightly warm water), you can remove most of the old potting media, and gently lay new media amongst the revealed roots, while holding the plant upright in the pot.

Thank you for the advice! I think I'll give it a go repotting them and use dbarrons's trick to gently get as much nursery dirt off the roots as possible. Do you usually let the roots dry before repotting?

Drying them out would be killing them (at least on most plants), it might not these semi-succulent, but certainly no need for it.

Really, the key to growing plants is to think about it. Plants grow (mostly) in soil, most plants that grow in soil like slightly damp soil.

Now...what do you think ?

If in doubt, think of the habitats and seasons where they occur in nature..and all is revealed.

You can pot up anytime, though very late spring to early summer would be ideal. I'd wait until mid-June to do a full repot, which includes bare-rooting and root pruning. Plants have natural rhythms (search Circadian and/or endogenous rhythm). Over the course of the plant's rhythmic growth cycle, their stored energy levels and their ability to create energy/food waxes and and wanes. In most cases, to repot (as opposed to just potting up) a plant when its energy stores and ability to create energy are both on the wane is to ensure a much longer recovery period. Repotting and root work is a heavy hit for the plant. It draws down the plant's energy reserves much faster than would occur if you repotted in June, when both energy stores and current photosynthesizing ability are reaching peak levels would be at peak. Since a plant's natural defenses are a byproduct of it's metabolic rate, it's not difficult to see how a significantly weakened plant with compromised ability to defend itself, combined with a longer recovery period work in concert to make the plant far more vulnerable than it would be if you were patient enough to sync with the plant.

Ecclesiastes 3:1 To every thing there is a season, and a time to every purpose under the heaven:

Your plants aren't in danger of serious decline due to root congestion, and they are small enough that, even if the soil they're in is VERY water-retentive, you can use a work-around that requires no special tools, materials, or knowledge, other than an understanding of how to put Newton's First Law of Motion to work on behalf of your self and plants, which I'm about to describe.

When you water, water to beyond the point of saturation. The entire soil mass should be at maximum capacity and a good measure of the water used in your watering exercise (at least 15-20%) should have exited the drain hole. After the pot has stopped draining of its own accord, hold the recently watered planting over the sink and move it up and down. You'll soon see that on the reversal from downward to upward motion, quite a bit of water exits the drain hole, and the sharper the reversal, the more water exits the pot. An object at rest stays at rest and an object in motion [the water in the pot] stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. When water ceases to exit through the drain hole, you'll have removed ALL perched water that has the potential to be of any consequence.

Last, but not least, we all have a 'nurturing bone' - we like to take care of things. Knowing that you're planning for your plants' future in a way that allows you to take advantage of its strengths and make allowances for it's weaknesses for no reason other than it's in the best interest of the plant, offers the grower a much greater sense of personal gratification than an approach that lacks that planning.

Al