Stardew Valley Mahogany Seed
You can get theses by using an Axe or Pickaxe to dig up dropped seeds underneath fully grown trees chopping Large Stump andor Logs or killing Slimes which are found in the Secret Woods.
Stardew valley mahogany seed. Maple Seed 0-2 Acorn 0-2 Pine Cone 0-2 or Mahogany Seed 0-1 depending on tree species. A tree starts from a seed and ends up being fully mature at later stages. Stage one is a newly planted seed while stage five is a fully grown tree that can be chopped down for the maximum yield.
Once players have found and acquired Mahogany seeds they simply need to plant these seeds to grow Mahogany trees on their islands. Trees do not have to be planted on your farm so you can convert the quarry into a hardwood farm leaving room on your own farmland for crops and animals. The wiki says Mahogany Seeds fertilized with Tree Fertilizer have a 60 chance of growing to the next stage each night.
The problem with filling Ginger Island with trees is I do think its your best source for clay especially the bone quarry. About a 10 chance. Hardwood in Stardew Valley like Mahogany is a potent resource.
Unfertilized seeds have a 15 chance of growing to the next stage. These are in addition to the 1 possible loose seed that may fall when shaking the tree. At its maturity shaking a tree sometimes drop acorn pine cone maple or mahogany seed.
If you need a lot of hardwood try planting a lot in a dedicated section of the valley like in the image above. They can only be grown by the player using a Mahogany Seed. In addition monsters in the Secret Woods have a 10 chance to drop a Mahogany seed.
To get hardwood in Stardew Valley you have to find the old logs and tree stumps there are slightly reddish or mahogany trees. A Mahogany Tree is a common tree that grows from a Mahogany Seed. The Mahogany Seed is a seed that grows into a Mahogany Tree.