Yeah, I see that bit of misinformation spread about a lot. A Hoe of Growth will indeed cause a Silverwood sapling to turn into a tree faster than it normally would, but it still does not remove the requirements. You must have at least 100 vis for a sapling to grow, period.
Now, let's just say you have an area a bit away from things that has no aura node nearby, and you want to fix that? It is possible, if not quick. First up, you need to know a) where the nearest node is and b) where the boundary lies between where it will cause a tree to grow and where it does not. To pull this off, you will need Goggles of Revealing and a discharged wand, or a damaged tool with repair, plus a metric shit ton of Silverwood saplings .A Hoe of Growth, preferably with Repair will speed this along.
Walk away from your base, paying attention to the discharged wand, or damaged tool. With no vis nearby, the wand will not charge, or the tool will not self repair. Eventually, you will get close enough to an active node that you will get charging or repairing. Mark that spot, and check the vis in the area, if it is over 100, you are golden. Walk a few steps closer to the active node, and plant a Silverwood sapling. Either Hoe of Growth it, or just wait. When it grows, cut it down, and you will have a new baby node. Now, plant 4 more sapling around that new node, let them grown, cut them down. If you planted them close enough, the new node will have grown to about 200 or so. Mark this node on your map.
Walk back to your base. If you were within 4 or so chunks from your base, you may have gotten lucky and you can pull from that new node inside your base. If not, discharge your wand, and repeat, walking towards the new node. Once you get just inside the point where you can draw from that node, plant a Silverwood sapling and repeat.Eventually you can string nodes as far across the map as you need, or until you get sick of it. Once your base is inside the charging radius, you can, if you like, grow your own personal node right outside using 10 or so sapling crammed fairly close together.
Use your Goggle of Revealing to watch the flux level. If it hits High or Dangerous, go take a break and do something else for a bit, growing Silverwood trees costs quite a bit of vis, and generates a lot of flux. Fequent breaks can keep Bad Things from happening.