Some have decided to buy moist packed seeds, and not only– many thanks to all!
I know that sowing in late fall/winter comes naturally for many people, but how about the summer/early fall sowing of moist packed seeds?
So, I will outline a few good practices; better to be safe than sorry :)
The received moist packed seeds need to be sown ASAP; keeping them for a couple of days at room temp after arriving is OK. The natural condition they are in right now is ‘warm’ cycle – do NOT place them in the fridge!
Many of the early summer seeds/fruits collections have a ‘green’ appearance or elaiosomes. After a few weeks the seed coats mature turning brown-blackish and the elaiosomes dry out/shrivel.
So, yes, the seeds I packed yesterday, shown in the featured image, look OK; there is nothing wrong with them.
Being kept slightly moist, these seeds are more delicate (i.e., the seeds coats can be soft) so handle them gently; do not rub between fingers. Prepare a pot(s) with your usual sowing mix (mine is a mix made from Promix with a bit of 3 in one 1 or black soil added) and spread the whole content of the pack on the mix; there is no need to remove the vermiculite.
Cover with one more thin layer of the same mix, and if available top up with grit/vermiculite/small gravel – highly recommended for the summer sowings. Water thoroughly (meaning watering a few times or place the pot(s) in a shallow tray with water).
What to do with the pots? They only need to be watered at intervals, and you don’t want them in the way the whole summer; some may even germinate in the second spring from sowing (Hepatica, Sanguinaria).
Of course that everything here also applies for sowing dry seeds.
I know that not everyone has a dedicated area for sowings/seedlings, so here are few solutions:
1-5 species/pots
Include the pots in a plastic bag/large Ziploc for easy handling, to keep the moisture level even and avoid weeds. Not my favorite method, although I used it in the past for fall sowings. A SHADED position is a must! Don’t forget to open the bags to check moisture once in a while; moss may become a problem. Recently I keep all summer sowing pots in plastic boxes (in a shaded position) and it works better.
An easy method is to include few pots in a plastic bag and keep it in a shaded location (just an example, I don’t use it anymore)
My favourite is the ‘space saving method’ – bury the pots/or even larger containers in the ground (cover them with a mesh). I detailed this in the Growing Jeffersonia from seeds post – please read more HERE.
A small, rectangle container (plastic or degradable) can be used for ‘community’ sowing, shown here already with grown seedlings (Maianthemum, Trillium… they were planted in the ground already).
You can go even further and place individual pots in a larger container (soil was added on the bottom of the container so the humidity level remains uniform); put your imagination to work!
Hepatica young seedlings, individual pots/large container – you can also use this method for sowing
A full tray of pots or more
You probably have a frame in this case :) but if not, choose one area somewhere in the shade (can be between other plants garden) where you can place the trays wrapped in a fine mesh.
Even better, if you have an available small spot around the backyard, make a simple wooden frame (you can also arrange flat rocks in a box-like shape) and place the pots inside with soil or sand underneath and in between; thus it is easy to cover them with a mesh and to keep the humidity constant during the summer months.
This is also good for keeping pots with summer dormant species like Corydalis, Claytonia and/or species that need more than one year to germinate.
Wood box-frame with dormant seedlings and new sowings
I realize that I forgot to mention the absolute most easiest method, which is: sowing the seeds ‘in situ’. It works wonderful for larger seeds like Caulophyllum, Uvularia but also feasible for Asarum, Sanguinaria and other species. Sow the seeds in the same location where you would plant them, water very well and cover with a mesh to deter the critters from digging them out. You have to pay particular attention to the sowing spot and water the seedlings during the first 1-2 seasons!
To end this long but hopefully useful post, keep in mind that the moist stored seeds are very fragile and, like all the other seeds, they are alive! Letting the pots dry out for an extended period during summer would surely result in no-germination next spring.
“When you think about it, seeds are improbable things. They don’t really seem alive, but of course they are, in a hidden kind of way….” – W. Cullina.
