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Hosta Seed Starting
by Bob Axmear

This is my version of starting hosta seed, I am sure there are many other ways to go about it. One thing to remember when starting seed indoors, especially in October, is that it is a long way until spring and by then it might not be so much fun. Unless you want to commit to 6+ months of indoor growing and plants getting pretty large by spring, late December might be better.

Someone asked when is the proper time to harvest seed, thought I would add a line about it here. I wait until the last minute if they are outside until the pods turn brown. I have been reading where they are probably ripe within 6 weeks though. If it is a special plant and I want them to be on the plant longer I pot the plant up and bring it inside. It is almost the first of November and I still have two plants inside the house and probably will have for another couple of weeks. Another way to extend the time is to cut the scapes off and place them in the house in sugar water for awhile. I add about a half a teaspoon of sugar to a glass of water and in goes the scape. Every few days or so I cut the bottom off the scape and clean it some and replace the sugar water.

Another thing to consider is seed quality or what the seed parents are. If a person is interested in growing new variegated plants you need to start with seed from streaked pod parent hostas, using a streaked pollen parent alone or a green plant will just produce more green plants, or blue plants if they are used. And usually not a very good quality plant. It is too hard to explain everything here but a person needs to consider what they want to do and where they are going with their hybridizing. The worst thing to do is buy seed from variegated plants and hope to get streaked or variegated plants from these. If you just want to grow a large amount of plants for some reason I would at least suggest buying seed of a plant that has a lot of substance or thick leaves and not from just common variegated plants. A few examples would be elegans and Love Pat, they are nice and blue with thick leaves.

These are just a few examples of solid colored plants that might be good for hybridizing. At this moment I can't really think of many but there are hundreds of good solid colored plants to use that will create unique new plants.

Centerfold, gold with puckering and size
Elvis Lives, for leaf shape and blue color
One Man's Treasure, for flowers and red petioles or stalks
Purple Haze for purple in the leaf base and petiole
plantaginea for large, fragrant white flowers

Once the seed are harvested I let them dry for awhile and then clean them. When I harvest I write the name of the plant on a brown paper bag like they used to use to carry lunches in and put either the scapes with pods or just pods in the bag, pods dry faster. Then I usually leave them in an unheated area of the house or garage for a few weeks or longer. This dries the pods and helps the pods split open for easier separating from the seed. I use collanders or wire strainers of various sizes like used in the kitchen to separate the seed from the pods. Then I mark the plastic seed packets and put the seed in the crisper in the refrigerator. If a person lets seed dry in a house unprotected with forced air heat eventually it will dry too much and die before you get a chance to plant it. Many people put plastic seed packets in a protective container like tupperware and store it in the freezer for long term storage.

Some say you can plant seed immediately and some say you should wait a while and maybe cool the seed for a few weeks or so. I don't know for sure which is right but most of the time I don't plan to start many until December or so anyway so it is a moot point.

When I do start the seed first I get quart plastic pots, ones that measure about 4" by 4" and about 6" deep. I have also used gallon pots as well. Most years I soak them for a while in a 10% bleach solution, this year I just washed them with soap in the sink. The cleaner and more sterile you get them the better though. You might get away with being less than sterile 9 times out of 10 but I would bet about anything the tenth time they will croak and it will be the most expensive or rare seed you have. I also mark each pot with white paint pens, these last for years, and it helps keep the name and date.

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Crazy Quilt Seed on 10-6-2006

Then I use only sterile seed starting mix, buy bags of it from nursery centers. Otherwise the seed might be overcome with pathogens and die if you use unsterile mixes. This really helps control or eliminate damping off as well. Another way to beat this is to microwave the mix on high for 10 minutes or so, get it really hot. It is like the Bird Flu, if you don't have the disease germs around or kill them they can't do any damage to your seed. You could use other mixes but they should be made completely sterile. Online recipes for making your own say use vermiculite, perlite, etc but have you ever really tried to find these lately. Almost impossible.

I moisten the mix with water until it gets pretty wet. Then I fill each pot almost to the top and then compact the mix, just press it down a little to firm it up and level it. This year I sprayed the bottom part of the mix with a weak spray of diazanon. Want to get the jump on fungus gnats if I would happen to get them. I sow the seed, maybe 30-50 in a pot making sure to take out as much foreign material from the seed as possible to keep molds from growing on the refuse. Then I sprinkle a little dry mix over them until they are covered. This year I am trying spraying the mix I cover the seed with water containing captan until the soil is moist, to help control any soil fungus that could possibly be present and damping off. I have also heard of No Damp although I have never tried it.

When I am all done I take a gallon sized bag, cheap ones from the grocery store that don't zip, and cover the pot completely, and tie it. If you ever moisten hosta seeds and then let them dry out you might as well kiss them goodbye. A bag helps prevent that from happening. Some people used trays with domes(ebay) for this. Keep them warm for about 10 days, around 70-80 degrees if you can, and then you will see them start popping up. Some probably faster, many a bit slower. If too cold they take forever to germinate and some probably never will. I wanted to mention the Dorothy Benedict and the DB seedling seed is just now coming up, I was beginning to worry about it. It took between 3 weeks and a month to germinate.

You can also purchase plastic domes(JR Johnson) for your trays. Here they sell them by 50s. You can probably find them elsewhere individually.

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Seed on 10-6-2006

Lighting (See my lighting setup at the bottom of the page)

I have grown them very well under shop lights 24/7 (doesn't need to be this many hours a day though), in front of south facing windows once they get up and some size to them, and also outside. You can also buy metal halide lights. I am trying these out this winter. Below are photos of shop lights and metal halide lights.

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Click on above photo for larger image
Photo by Roger Kinchen

Metal Halide


I have been trying to grow the seedlings in front of south facing windows but might have to give that up, for awhile anyway. They need plenty of light when they are coming up and they haven't been getting that. (added this 11-9-2007)

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Seed on 10-20-2006

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Seed on 10-22-2006

When the seedlings start to get a little height to them I start to open the bag slowly. I don't get into too much of a hurry to do this unless there is a problem. Not all the seed germinates immediately and it is best to give the stragglers a little time to geminate as well. After a few days of opening the bag a little more each day until it is off, I start bottom watering to keep the soil moist when needed. This helps to keep damping off down as well and once the roots get down a little you don't need to keep the top as moist either. This helps control fungus gnats which need a damp surface to survive.

I read where diazanon controls gnats very well, both the flying insect and the grubs. Another way I have heard that is effective and I am trying it this year is mosquito dunks that are normally used to control mosquitos in standing water. I tried beneficial nematodes this year and they worked excellent. I bought them from this place because the shipping was free, everywhere else they wanted as much for the shipping as they wanted for the nematodes. You can also find them at the same place they sell domes above. I mixed the nematodes in about a quart of potting mix and then a pint of water and mixed well. Then I put a marble size piece in each pot and took a baster and watered them in. They haven't killed all the gnats but there aren't too many after about 6 weeks.

I reordered the nematodes on 1-8-2008 and as of today, 3-8-2008, I see almost no gnats. This is great not have to mess with them for months at a time. I worked with the plants all day today and really can't rememeber seeing one gnat. I never had that kind of control with anything else I have tried.

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Cajun Sunrise Seed on 12-1-2007

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Dorothy Benedict Seed on 1-4-2008

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Dorothy Benedict Seed on 3-2-2008

Below is probably a Dorothy Benedict seedling, I lost it last spring when we had a cold snap.

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I will add to this about tranplanting and hardening off later.

Questions? Comments! Cussing!!

Thanks
Bob


Below are seed I collected from seedlings I had grown the year before.Many of these will have to be culled for lack of substance.

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I use 3 stands like this, also cheap fluorescent lights, 24/7.
These cost little to construct and you can grow many, many hundreds of seed this way.


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Part of the seed I grew, will be glad to get them outside as soon as possible. I have them here for natural sunlight until I can move them out and give me room on the stands for the rest which are also growing rapidly. 3-8-2008


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This is all but about 30 flats of the seedlings. Wish the weather would straighten out to get them outside. 4-28-2008


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Getting them planted out. 6-27-2008


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