Three feet of growth in five days

I lowered the hop twine on both plants on Monday and Wednesday and this morning they were back up to the top again. That's about three feet of growth in five days! Here they are after lowering the twine... again.

I'm definitely going to have to think about a new trellis system or modify this one somehow. I like that its part of the pot which allows the entire plants to be moved with ease if necessary to adjust for sunlight (or hurricanes), but I'd like something that holds a bines a little more steady. I've got some ideas, I just need to actually try them.

The moisture meter is still indicating moisture levels of 5 ~ 9 in different areas and levels of the soil. I'm beginning to wonder how accurate it really is, but there must be some truth to it as I haven't watered the plants since Monday and they've obviously continued to grow. That would indicate there's been plenty of water for them in the soil, so I guess I had been over-watering without adequate drainage for the pots which is the most likely cause of the recent leaf discolouration.