i've some mange tout and wondering how close i can plant them, realistically? will they support each other?
Unwashed,
Difficult to say ..... there are very short vined mangetout, medium and tall growing mangetout. If you know a variety name that makes it easier to comment. Default would be: The mangetout scramble along the ground, supporting each other to a degree, you get some harvest.
Le-y ,
I agree with Robert about supports. However I would not put as many as 12 seeds in a 3 inch pot, 4-6 seems about right, but that is personal preference and allows me to keep them in the pot for a bit longer, if the weather is not suitable for planting out. Each of my little pots is planted about 20cm apart from the next one. If the plants are still small, a bottle cloche will fit over a planted out 3 inch pot for protection.