Answer: Sounds like you've done everything right in provide a good home for your plants so I think the problem is weather related. Beets and Swiss chard grow best in cooler weather and can stop growing, and even bolt (send up a flower stalk) if things get too warm for them. One consideration when gardening in containers is that the soil warms up much faster. This can overheat the roots of cool season veggies (but makes tomato plants quite happy!). Try to shade the containers from summer heat by grouping them together or placing a decorative pot or even a large stone on the sunny side of the container. This may help keep the soil a little cooler and keep your beets and chard growing well. Best wishes with your garden!
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