These two alostroemeria plants have come back very sparse. There is growth around the edges of the pot but the centre is very bare. Last year they filled the pot. Any ideas why? Should I plant something else in the gaps?
I'm no expert, but mine are much better so this is what I do. I overwinter the containers in an unheated greenhouse from the first frosts. They flower all winter, on and off and continue to grow. In Spring I check to see if they are pot-bound and if they are, divide them and plant up into generous pots, because they make lots of roots. This slows down flowering for a bit. With yours, I would be inclined to take them out, very carefully, put into fresh compost and, yes, you could plant something else, but it will soon be swamped by your recovering alstroemeria.
I would tip it out of the pot and discard the older middle bit, this happens a lot on these plants. Take off the two outside growths and pot up individually, they have excellent root systems and should romp away!
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