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Deep digging

Posted by weatherlawyer SoT UK (My Page) on
Tue, Mar 6, 07 at 1:08

I ran a search of this forum hoping to get some information about Dutch irises and freesias. Nothing on freesias and one dead end thread on the irises.

So, assuming I can get on to my marsh today or the weekend, what depth do I plant them?

Also it is heavy clay with a lot of nearby trees drying the border out in the summer but not preventing it from puddling in the winter.

I will consider adding lime to one or two stretches as I have so much space to play with. But am loath to change the soil type unnecessarily as I might want to plant azaleas in there one day.


Follow-Up Postings:

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RE: Deep digging

I don't think the Dutch Irises will be too keen on being waterlogged all winter. Maybe try some of the other Irises that like being in a pond? Freesias I don't know, but I'd guess the same.

Plant the Dutch Iris just like any other bulb, with soil twice the height of the bulb on top of the bulb. The non-bulbous Irises should be planted close to the surface.


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RE: Deep digging

Unless you have a very sunny spot, I would keep your freesias indoors, or you are in for disapointment. I live in California, and only in the southern areas can we grow them outside. Freesias will definitely not do well in clay soil. They need fast draining and sandy soil. They are usually planted about 2 inches deep. You can get about nine of them in an 8" pot.

If you would like more information on them; let me know. I planted some this winter and they did wonderfully; I just got the wrong colour; as I think they got mixed up in the bin!


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RE: Deep digging

I do keep my freesias indoors and am still disappointed. They're one of those things like acidanthera and tuberoses that don't seem to quite fit the timescale of the UK growing season but for some reason they still sell them anyway.

Like Weatherlawyer, if anyone knows different I'd like to hear about how it's done!


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RE: Deep digging

Okay. Here goes:

In a lot of cooler weather areas [some where average minimum temperatures range from 0 to 10 degrees Fahrenheit in winter], raising pots of freesias is a September to April activity. Most people do not live in areas where it is warm enough to grow freesias. They can be a challenge; but you can do it! You can begin by using corms that have been saved from last year's crop and also purchasing a few new hybrids.

As with all bulbs, it is best to select those that are large, plump, and firm. Pots really can be any 6 or 8 or 10 inch size. I don't particularly like the low bulb pans, because they need too much watering and don't hold the amount of soil that helps good growth. Terra cotta or plastic both work well.

As for soil, the standard mixture of equal part loam, peat moss and sand works the best. They need a well-drained soil so perhaps one third perlite or vermiculite could be a solution, too. Some people like using those better than sand.

Around early September, I begin the process of gradually potting up the freesias, a few pots each week, that I want to have blooming around January through March.

About 6 or 8 corms are gently spaced and placed an inch or two below the soil mixture, firmed down with a bit of soil and then watered thoroughly. This count is for the smaller pots. Do not crowd the corms as they do need a bit of room for development. The corms should placed about two inches apart. The pots do not go right into a greenhouse as I do not have one; but if you do, it is a good place to keep them a bit later on. You can place them in a cool, dark or shaded area to enable them to establish a nice rooting system. An insulated cold frame will do nicely, or even outside under an eave. They do not need light or sun until the first leaves show. They should be at about 45-55F, no higher; as it will promote too fast a development. Any lower and the bulbs could rot; so try to get it around those temps. Freesias are happier if kept this way for about 45 days. If they are kept cold or cool for too long, they will develop corms above the soil line, so you must pay a bit of attention to them.

Once new growth appears in each pot, move the plants to a slightly warmer area; in the house is ideal. The temperature here should be about 60-65F. If necessary, add a bit of water to pots that seem to be drying out. Freesias need a good amount of water during their entire growing period, though watering should not be too much. Keep the soil moist, but not wet. Now that they have leaves, they must manufacture food for bloom, so light is important now as well. A south-facing window might be cool yet bright enough to suit them. Don't worry about being exact with these requirements. As long as the freesias receive sufficient light at this stage, they will manage to bloom. Very warm temperatures however will delay flowering or cause bud drop or blasting, as with other bulbs.

When the foliage gets to be around 6 inches tall, it is necessary to begin staking each pot with 2 foot-long bamboo stakes. Connect the stakes with twine or wire, or even heavy cotton. As the foliage grows to almost 2 feet, keep pushing the greenery inside the staking arrangement. This process helps to keep the individual pots looking neat and eventually guides the flower buds to grow tall and straight.

Now is the time to begin a program of fertilising. Any all purpose liquid fertiliser (10-30-20) is quite sufficient, being sure to follow the directions on the container. Make sure it is a non-acid type and keep the soil moist but not sodden. Flouridated water is often said to be a problem with freesias, normally it is not if you use a good fertiliser and soil; but if you wish you can use bottled water.

Aphids and white flies can be a problem, especially in a greenhouse with inadequate air circulation and with plants too close to one another. Deal with these pests as you see fit. Sme people use a pesticide, others prefer not to. If they are in the house it is not such a problem, but it can happen, so watch for them. A cooler window with lots of light and space around them can help here.

Depending upon the growing conditions and the type of freesia you have, the first blossoms will appear approximately two to four months after planting. Continue fertilising each week as long as they are in bloom; which could be a few weeks.

Keep watering each pot as the the foliage turns brown. When it begins to warm up in springtime, the pots can be put outside. Let the corms dry a bit after lifting them; and store them in a cool, dry, and airy spot for the summer. If stored in closed containers they will certainly rot. If stored with too many on top of one another they will also be prone to rot.

You can start all over again now!


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RE: Deep digging

Fantastic post from Hopflower. Thank you. I'll print it off for reference.

However, we get colder winters than that here, and probably longer too. Would that affect when the corms should be brought into growth?

Are freesias a plant that flowers during short day lengths? It goes against the grain to be starting anything into growth in September as they will need so much special care for them to survive the winter.


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RE: Deep digging

Yes. I know what you mean, as I have family is England and have visited there often. I wrote it as I do it and hoped you could apply the principles at the appropriate time of year for you. I would think you could start your growth when the weather cheers up and you get longer days. This might mean early spring (to take into account the 45 day period; when it is still cool and before summer arrives). Still, your summers are not that hot so as to be concerned with tropical heat waves! Or could it mean very late winter? You would have to experiment a bit with that and perhaps you could start two pots (one behind the other by a few weeks) just to see how they react. It is true that being further north your days are shorter, and a faster and colder (and longer) winter approaches. One of my cousins grows freesias there occasionally. I could ask her which month she starts them in. They also have a glasshouse, though.

I must say that our weather has been very weird, lately. It has seen us have very, very hot summers when historically we only get a few real scorchers say, 3 days per year. I am talking 108F degrees which is far too hot for me and seems to be getting longer each year the last few summers! I may have to revise MY schedule!


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RE: Deep digging

Expect Freesias to flower in spring and early summer here, not late winter. You still have to follow a suitable temperature regime.


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RE: Deep digging

According to Eric Sawford, who has written a book on bulbs; you can use John Innes 2 potting mix and leave the pots on a sunny window as they only need about 4-5 hours of sunlight per day. He recommends starting them at the same time I do here; it just might take a bit longer for yours to flower. The idea is to keep them cool at first and in a shady aea, not too dark just that they don't need sun yet; keep them moist, and fertilise them when they start growing and through that period. They can be kept a bit warmer as they start to develop a few inches high to temperatures around 54-60. His book, of course, was printed in the U.K. and he grows them frequently. I had occasion to go to the library last night and looked this up.

So, no excuses! Go plant those freesias!


 
 

 

 


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