What it is
Sow seed where you want the tree. No nursery. No tubes. No staking.
Tube planting works. It also costs a fortune per hectare. Direct seeding runs at a tenth to a third of that price and covers ground fast.
You trade control for scale. A seedling in a tube is a known quantity. A seed on the ground faces rodents, birds, grass, drought, and fungi.
Establishment from direct seeding lands between 5 and 30 percent. Tube-planted survival runs 60 to 90 percent. You make up the gap with volume.
When it works
Big, tough seeds win. Native oaks, walnut, chestnut, and most tropical hardwoods germinate readily and outrun the grass.
Small-seeded species with fussy germination conditions belong in a nursery. So do slow growers that lose to weeds in year one.
The best reforestation projects run both. Direct seed the bruisers. Tube plant the sensitive ones.
Collect the right seed
Provenance beats quantity. Seed from parent trees within 50 km of your site, at similar elevation and aspect, carries generations of local selection.
Pick healthy, well-formed parents. Skip isolated trees. Self-pollination breeds weakness.
Collect from at least 15 to 20 parents per species. That genetic spread is your insurance against the climate your site will see in 50 years.
Timing is narrow. Many species give you a two to three week window between ripe and gone. Watch for colour shift, fruit softening, or the first seeds falling. Seed banking covers the rest.
Break dormancy
Most natives stagger germination on purpose. Good for the forest. Bad for restoration timelines.
Scarification. Nick, file, or sand a hard seed coat so water gets in. Concentrated sulphuric acid works for industrial volumes. Near-boiling water poured over legume seed, then left to cool, mimics fire and breaks the coat on acacias and many tropical pioneers.
Stratification. Mix seed with damp sand. Hold at 1 to 5 degrees Celsius for 4 to 16 weeks, depending on species. Some need a warm stretch first, then cold. Get the protocol wrong and you cook the embryo or wake nothing up.
Look up each species before treatment. Guessing kills the batch.
Seed balls, the Fukuoka method
Masanobu Fukuoka rolled clay around seed and threw it at degraded hillsides. The clay shell hides the seed from birds and rodents. It holds in moisture. When rain arrives, the ball softens, the seed wakes up, and the radicle drives into wet soil.
The recipe is simple. Three to five parts clay. One part compost. One part seed. Add water until the mix balls up. Roll to marble size. Dry in shade. Broadcast.
A group of volunteers can make thousands in an afternoon. You can fling them from a vehicle, a drone, or a slingshot.
The catch is climate. Reliable monsoons make seed balls sing. Erratic rain leaves them baking on the surface until viability dies. Thick clay can also trap the radicle inside. Test ratios for your site before you commit a season's seed.
Get it on the ground
Hand broadcasting suits small or steep sites. Walk transects. Keep the rate even.
A calibrated fertiliser spreader behind a quad gives better coverage on accessible terrain. For thousands of hectares, helicopters and drones are now the cheapest line on the budget.
Site prep multiplies success. Scalp the existing sward down to mineral soil. Bare ground means seed-to-soil contact and one less competitor. On grass-dominated sites, a strip of shallow cultivation buys your seedlings six months.
Press or roll after broadcasting. Loose seed on the surface feeds birds.
What to expect
Plan for 5 to 15 percent establishment in most conditions. Higher on prepped sites with good rain. Lower on bare, dry, untouched ground.
That means 5 to 20 seeds per future tree. The maths still favour direct seeding on cost at any real scale.
The trees that do come up are tough. Their roots grew in place, no transplant shock, and the weak genotypes died in the seedling phase where they belong. Pair this with assisted regeneration and cluster planting for a full landscape strategy.