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Broccoli seeds

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Mrs Muggleton	Broccoli seeds		Lead	[-]
Established Tree Posts: 4290 16-03-08 19:41 Established Tree	I planted some purple sprouting broc seeds last week in the propogator, in Arthur Bowers seedling compost, mixed with vermiculite and put them in the heated propogator on a sunny windowsill. I have watered them lightly since and checked them regularly. On checking them this morning I noticed the seedlings had come through and they were all white and furry ... damped off! Everthing was cleaned, and the compost and vermuculite were both new. Why has this happened? Any ideas?
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LynneBee		#1	[url]	[-]
Established Tree Posts: 6100 16-03-08 20:41 Established Tree	Maybe too much water and too much heat
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scotia10		#2	[url]	[-]
Mature Shrub Posts: 2560 17-03-08 15:24 Mature Shrub	I don't know really other than to say you might have overdone the 'looking after' i.e you have done things that I think may have been unnecessary.e.g I planted some purple sprouting broc seeds last week in the propogator, They didn't need a propagator so they might have been too warm in Arthur Bowers seedling compost, mixed with vermiculite You didn't have to add vermiculite this might have added to the heat/moisture content. and put them in the heated propogator on a sunny windowsill. The windowsill would have been sufficient. I have watered them lightly since and checked them regularly. They should not have required additional watering, if they did this was down to heat & sunlight causing evaporation. On checking them this morning I noticed the seedlings had come through and they were all white and furry ... damped off! Too warm I suspect, when you can consider that most brassicas will germinate in the soil outdoors later in the year this suggests that they do not require too high temperatures to germinate, lettuce being the classic case these won't germinate if conditions are too warm. Sorry I am not the bearer of any good news other than to try again but under cooler conditions www.thegardenersalmanac.co.uk
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Mrs Muggleton		#3	[url]	[-]
Established Tree Posts: 4299 17-03-08 15:44 Established Tree	Thanks guys Will try again, and not so hard!
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BryonyUK		#4	[url]	[-]
Established Tree Posts: 3996 26-03-08 23:43 Established Tree	I'm glad I read this - I shall know what to do with my sprouting broccoli now. Thanks Scotia.
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scotia10		#5	[url]	[-]
Mature Shrub Posts: 2564 27-03-08 16:02 Mature Shrub	The rule of thumb I work with for seeds is; If the packet says ' sow directly into the bed' or words to that affect, then this means they don't require too much heat to germinate 40°-50°F ( 4°-10°C) should be enough. Higher heat often ends up with very fast germination,and leggy plants that are more susceptible to disease as you have found. If the seed are half hardy they will require 'highish heat' e.g. 65°F+ (18°C+) as a general rule. Some will need even higher than this. www.thegardenersalmanac.co.uk
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