Raspberries, planted too close?
A few questions from a novice gardener:
1. How important is it that raspberry rootstock are planted 4 feet apart? My sister helped me dig some holes today for the plants I had ordered from Park Seed, but after she left I realized I had three rootstock tied together, not just one plant. So my hole was not the proper size for spacing three plants. Feeling anxious, I went ahead and planted them in the hole anyway, about 6 in apart. How serious of a problem is this?
2. I once read that different varieties of raspberries should not be planted closer than 300 feet from each other. The two types I ordered were "Heritage" and "Anne." We don't have that kind of space in our yard, so I planted them about 100 feet apart. Why is this spacing important? Does it have to do with cross-pollination?
I know this is all after the fact, and I'm sure I'm learning lessons the hard way. I just want to know if anyone has some expert advice. What kind of problems am I up against? Are my raspberries going to be too close to thrive? Is it too late to transplant? Thanks.