Tag Archive for: Moist packed native seeds

Many NA native species, especially spring flowering, are included in the ‘moist packed seeds‘ category (see also Corydalis & allies). By late spring this category is almost depleted of available seeds (with exception of Caulophyllum sometimes).
Species not sold out during fall/winter, will start to germinate in moist storage.

FAQ
Why are moist packed seeds not available year round?

  1. Because in the eventuality they are not sold out, they start to germinate in moist storage.
    Even if large quantities were to be collected, shipping past due germination dates would not be possible.
  2. When do they start to germinate?
    Depending on the species, it can happen as early as November (Paris quadrifolia) and December (Claytonia) and then gradually till February-March (most other species).
  3. When is it best to purchase moist packed species?

As soon as they are announced available in the Shop (please subscribe to the blog) or at any time before they start to germinate or temperatures drop below zero (in the winter), at which point they cannot be shipped safely.
To be on the sure side, I would consider June (for the first species available) and  September/October/November ideal; these seeds are active physiologically and shipping them during deep freezes in the winter can be detrimental.

Various species could sell out fast (Claytonia, some Hepatica forms) and it is best to buy them as soon as they are announced in the shop, starting in late May/June, (depending  on the weather).

For those new to the “moist packing” subject, these postings may answer other questions:
Moist packing – what’s that?
We got the moist packed seeds – now what?

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 some 3:1 or black soil) 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.

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.

 

As I was packing seeds today, I thought that maybe some people who never bought or they buy for the first time moist packed seeds may wonder what they would get.

Sometimes I get questions as well, so although I have shown pictures in previous posts, it is good to tell again. There is no secret; seeds that are known to be hydrophilic (to make a long story short – these are seeds which need to be sown right away after collecting or if not, kept moist to preserve their viability), are cleaned from the fruits and stored in slightly moist vermiculite in Ziploc bags. And no, there is no need to spray the seeds with anything chemical.

For shipping, the portion of seeds is placed in smaller bags with a bit of the moist vermiculite (*exception for some AU and NZ orders, when the seeds may be packed with a piece of moist paper towel). These seeds are to be sown right away after receiving.

Asarum canadense moist packed seeds for shipping

These small bags are not intended for storing the seeds long term!!! (I know someone tried to do that, that’s why I mention it). If you really want to keep the seeds longer, and /or provide stratification in the fridge instead of sowing, you need to transfer them in larger bags with added moist vermiculite (slightly moist peat works as well).

Very small seeds, like those of Coptis shown in the picture, are easily sown by spreading the content of the bag on top of the potting mix (no need to pick the seeds from the vermiculite). Even larger seeds are better sown this way.

Coptis trifolia moist packed seeds

In case of hydrophilic seeds, if kept dry they will either not germinate at all, or will germinate poorly/over a longer period of time. Keeping them moist and allowed the required cycles that mimic the natural conditions will result most times, in 100% germination in the spring. It is a lot of extra work but worth doing it.

Thank you! – Merci! to all our customers