mater plant dates

thomis(7)February 11, 2009

According to this article:

Tomato plants should be planted outside when "Planting outdoors is best done about 1 or 2 weeks after the average last frost date for your area."

According to this article from NCSU, "Average Frost Dates for Selected NC Locations":

For Durham County, the average last frost date is April 13 with 12 days standard deviation. So, should I plant the transplants 1 Â 2 weeks after April 13 or April 25?


Thank you for reporting this comment. Undo

You probably have an extension agent right in Durham county that you can ask. I am south of you and generally our last frost date is April 15th. It is tempting to plant as soon after that date as possible, but tomatoes like warm soil and will just sit there until the ground is warm enough to really start growing. If the ten day forecast indicates that you won't have anything below 40 degrees at night after the 13th, waiting the week or two after that should be fine (plant about the 25th). Believe me, the risk of loosing your plants to a sudden cold snap far outweighs getting the plants in the ground too early. Also, because Lowes has tomato plants for sale does not mean you can plant them outside. I've seen frost kill their stock all the time!! Are you starting seeds?

    Bookmark   February 11, 2009 at 2:31PM
Thank you for reporting this comment. Undo

I remember a frost the first week of May a couple of years ago. I can only sow so many seeds inside since my shelf space is limited so I save tomatoes and basil for last which usually ends up being mid April or later. Both of them are soooo picky about temperature that it just isn't worth it starting them early. There are plenty of other things to work on that enjoy the early cool temps.

    Bookmark   February 11, 2009 at 4:03PM
Thank you for reporting this comment. Undo

I remember that frost also! I have started onion plants in the house this year for the first time. Have you ever done onions from seed? I used to do sets but last year I bought plants and had the best onions ever. This year I am raising my own onion plants.

    Bookmark   February 12, 2009 at 11:42AM
Thank you for reporting this comment. Undo

I always grow mine from sets and I usually don't grow them at all because I don't eat that many and they are so cheap in the store. I would like to try some of the specialty ones though. I have always heard that home grown can taste much better. My sunshine is limited so I tend to grow a big crop of something one year and freeze it and then grow something different the following year. This year I have onions (white) in the ground, grown from sets.

There was a post on GardenWeb, over in the farm forum or veggie growing forum, years ago from someone that knew a lot about growing onions. They claimed that starting them from seed was not the easy way, but that it gave a much better bulb in the end. It was something about onions being biennials and that exposing the actively growing plants to winter chills will cause them to switch to their second year "I'm gonna bloom" schedule. Whereas if you sow seed early inside and then set them out in early spring they only make extra large bulbs by fall. It was her way to have nice uniform large onions to sell at the farmers market. Someday, when I get a bigger garden space with better exposure I will be sowing a lot of onion seeds.

    Bookmark   February 12, 2009 at 12:27PM
Thank you for reporting this comment. Undo
nckvilledudes(7a NC)

The way the weather has been the last few years I would not use last average frost date as a guide to do anything. Tomatoes are heat loving plants and if planted in soil that is too cold, will just sit there until the soil warms up. Consider growing tomatoes in containers since the soil in them will warm up much faster and give you ripe tomatoes much earlier.

    Bookmark   February 12, 2009 at 3:03PM
Thank you for reporting this comment. Undo

Thomis, I believe I would listen to the posters above re specific dates BUT with regard to your specific question that related to average and standard deviation and the 13th (avarage last frost) and 1 standard dev SD being 12 days; this means that there is approximately a 67% chance the last frost will be between the 2nd and 25th of April and a 97.5% chance it will not be after the 7th of May (+2sd). The recomendation of 1 or 2 weeks after the average was a compromise of less than one sd away from the average which would seem risky even from a mathamatical standpoint because it suggests at least a one forth chance of a freeze after planting. On the other hand, perhaps tomatoes can stand a light freeze and a heavy one is less likely.

    Bookmark   February 12, 2009 at 4:24PM
Thank you for reporting this comment. Undo

Entire books have been devoted to gardeners trying to be the first person on the block with a ripe tomato. It isn't worth it. The chemicals in a tomato that give it its distinctive "homegrown" flavor are destroyed by temperatures below 50 degrees - this is why you shouldn't store tomatoes in the refrigerator. So even if you rush the season and get your plants to fruit early they aren't going to taste any better than the "chilled-in-shipping" one's you can buy at the grocery store. Sow them in May when the temps are reliably warm and you'll have great tasting tomatoes sometime in June.

    Bookmark   February 13, 2009 at 9:18AM
Thank you for reporting this comment. Undo

Great information from all!

Plant 'em the first or second week in May and you'll be fine. (Of course if your 7 day forcast looks good you can push this into the end of April....)
You can use cold frames/black plastic to warm up the soil
and get them in a week or two earlier, but usually it's not
worth the effort.

Your best bet if you want something earlier is to plant a couple of ealry ripening varieties. I had Sungolds last year
in 51 days from transplant.... Mid/End of June tomatoes!


P.S. A good rule of thumb for maters in central NC is
seed start Feb end
transplant Mar end
plant out Apr end

    Bookmark   February 13, 2009 at 2:50PM
Thank you for reporting this comment. Undo
nckvilledudes(7a NC)

Books may have been written on anything, but the simple fact is that tomatoes will not produce much growth when the soil is cold. Planting in containers where the soil temps. will warm sooner will give you tomatoes sooner since by then the air temps. will have warmed enought to give you good tasting tomatoes. Soil temps lag air temps by leaps and bounds. Give it a try if you haven't tried it!

    Bookmark   February 13, 2009 at 6:03PM
Thank you for reporting this comment. Undo

Good info for me guys!! I just started seeds today, Beefsteak and Roma's. My plan is to grow a few in containers and more in both a regular garden and a raised bed. According to my calculations, they should be ready for the ground around the end of April and I'm just a touch warmer than you guys are.

    Bookmark   February 26, 2009 at 6:56PM
Sign Up to comment
More Discussions
Is it difficult to grow dahlias in NC? Which are easier?
There are lists of most likely to succeed? But what...
Need plant id
Hi friends, Could somebody I'd this tree. The fruit...
onions from seed; one more try
I've struggled to grow onions from seed and have tried...
Decidious Magnolias Toast Sunday Morning?
Most decidious mags are blooming their beautiful pink...
I'm back after a long hiatus, and wow!
Hi everyone, I haven't been on GardenWeb for a while,...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™