How to Propagate Seeds

Cosmos and Sweetpeas at Petersham Nurseries
Cosmos and Sweetpeas at Petersham Nurseries

Now is the ideal time to propagate seeds so that you can plant out your seedlings from mid May onwards, when the likelihood of frost has passed. Following garden designer Georgina Chahed’s successful propagation of Cosmos and Marigold seeds last spring, here’s Touch Landscapes’ super easy six step guide…

1. Lay fine gravel in the bottom of a plant propagator tray.

2. Wet the gravel so the water comes just above the level of the gravel.

3. Spread seed compost in the seed tray, make it level and firm the compost slightly with another seed tray on top. Then remove the spare seed tray.

4. Make tiny drills (grooves) lengthways across the compost and lightly sprinkle seeds across the drills. Add a thin layer of compost to cover the seeds.

5. Fit the seed tray onto the bottom of the propagator, allowing water to filter through and moisten the soil above. Remove the seed tray when damp but not too wet. Drain the excess water off the bottom gravel tray and then place the compost tray back on to the damp gravel tray.

6. Place the propagator lid on to the bottom of the propagator and seed tray and leave the seeds to grow, checking on them every day to make sure they don’t dry out.

In a few weeks, we will update you on the progress of our own seeds!


March 5, 2015

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