slight Batavian characteristics: crisp and holds well on shelf, green interior, vibrant color
Disease Resistance APH Aphids BR Bottom Rot CR Corky Root DM Downy Mildew (race specified if known) LD Lettuce Drop, White Mold, Sclerotinia LMV Lettuce Mosaic Virus MTO-10, MTO-30 indicated that 0 seeds out of 10,000 or 30,000 seeds have tested positive, respecively (aphid resistant varieties are bred to reduce the spead of LMV from other crops or non-resistant varieties) TB Tip Burn
Lettuce (Latuca sativa) is cool season annual
in the Compositae family, which
includes endive, escarole, chicory, globe artichoke, sunflower, Jerusalem
artichoke, salsify, and burdock.
Looseleaf- var.crispa.First to maturity, these fast growing lettuces
do not form a head.Good for babyleaf
Butterhead - also known as bib, or Boston, this type forms a loose head with
slightly oily leaves. Beautiful, sweet and tender, but bruises and tears
Romaine var.longfolia.Romaine forms a tall dense upright head
with a tender heart. It tolerates warm temperatures and is less prone to
Iceberg var. capitata.The fussiest type to grow, iceberg will
form a compact round head if given a long cool season. It bolts easily if
cool, well drained, loose soil with pH 6.2-6.8. Lettuce is sensitive to low
pH.Use 50-75lbs Nitrogen/acre, ~150
Phosphorus and Potassium/acre. Sidedress with N 3-4 weeks after planting.
With transplanting, use 2lbs/50 gallons starter fertilizer, 4-8oz per plant.
to partial shade
seeds require minimum amount of light for germination.
- ~60 seeds/ft, in 2 bands. Full size - ~3 seeds every 8-10.
continuous band. Full size 8-12
- Ύ between bands, 16 rows/36 bed. Full size - 12-18 or 3 rows/36 bed, 5
When to Sow
can be seeded in the spring as soon as the soil can be worked. Days to
maturity are from direct seeding in spring conditions, subtract 10-14 days if
transplanting, subtract 7-10 days if planting in summer conditions, add 20
days if planting late summer-fall In certain areas, lettuce can be grown
throughout the summer by choosing varieties which are heat tolerant; however,
many lettuce varieties have difficulty germinating in soils above 75°F.
Start transplants 3-4 weeks before setting out. Sow seeds 4 per inch in
flats or small-cell plug trays, barely covering with fine soil. If sowing
into flats, transplant 2 weeks later into plug trays, pots, or into another
flat at 1-2 apart.
off seedlings by reducing water and temperature for 2-3 days before
cold tolerant varieties to withstand light late-season frosts.
moisture levels even. Drought stress can cause bolting.
heat tolerant, bold-resistant varieties (such as Batavian types) for summer
seeds/oz avg. M= 1,000, MM=1,000,000
- 96M seeds/100 bed (~ 4 oz), 960M seeds/1,000 bed (2.5 lbs), 7.7MM
seeds/acre (~20 lbs), using ~960 seeds/ft, 16 rows/bed, 36 beds, 6 row
centers. Full Size - 360 plants/100 beds (~1/32 oz), 3,600 plants/1,000
beds (1 oz), using 10 spacing, 3 rows/36 bed, 5 center beds. 31M
plants/acre (~2 oz), using 10 plant spacing. These specifications are meant
to be general guidelines for the particular application as noted. They can be
loosely applied across the board for lettuces/mixes found in this section.
Seed Coating /
the varieties we carry receive an organic film coating applied to the seed,
which make the seed easier to see during planting.
holds best when harvested in the morning and cooled rapidly. For salad
mix or baby leaf production, harvest individual leaves when they reach
desired size, or cut evenly across the bed making sure to stay above the
growing tip. For a continuous harvest, sow lettuce every 3 weeks.
just above freezing temperatures with 98% humidity.
Tarnished Plant Bugs cause
brown scarring on stems. Romaine is especially susceptible.
Cabbage looper and cutworms
can be controlled by Bacillus thuringiensis (such as Dipel DF, see
Supplies) and/or spinosad (such as Entrust), preferentially in rotation
with one another to prevent selection of resistant individuals (check
with your certifier before applying).
Leafminers burrow underneath
the skin and leave weaving, translucent trails. They are usually
controlled by natural enemies.
Slugs and Snails can be
baited by beer traps. Practice clean cultivation and avoid mulch.
lettuce diseases are best prevented by production practices that maximize
airflow around heads to stimulate rapid drying. Many varieties have been bred
to have disease resistance.
DM: Downy Mildew (race specified, if known), TB: Tip Burn, WM: White Mold, BHR:
Bacterial Head Rot, BR: Bottom Rot, HS: Heat Stress, LMV: Lettuce Mosaic
Virus, APH: Aphids,
Drop (Sclerotinia sclerotiorum,
also called white mold). Grow on raised beds, rotate crops with grass.
Bottom rot (Rhizoctonia
solani). Select plants with upright growth habit. Take care not to set seedlings
Lettuce mosaic virus (LMV) is
highly seed-borne. Choose a reputable seed source. MTO-10, MTO-30: 10,000 or 30,000 seeds were tested for the
presence of Lettuce Mosaic Virus, none was found. A disease-free test
does not guarantee a seed lot to be disease-free, only that no pathogen
was detected in sample.
Damping-off (caused by a
number of soil-borne fungi) Avoid overwatering when plants are young.
Downy mildew (Bremia
Self-pollinated. Lettuce varieties will not cross
pollinate with each other even at short distances, but beware of any wild
lettuce which can cross with lettuce. Allow plants to "bolt" and
eventually flower. Under wet conditions lettuce plants may need to be covered
with a rain cover or grown in a greenhouse to prevent fungus from infecting
the plant and seed heads. Carefully shake the seedheads into a paper bag to
allow the mature seeds to be collected while leaving the immature seeds and
flowers to keep growing. Gather every few days until no more seeds remain.
Also, you can simply harvest the entire plant when about half of the seeds
are mature and allow the rest to mature inside by standing up the plants in a
box and on a cloth or tarp. Use an 1/8" screen to help with cleaning.
Lettuce seed can remain viable for 3 years under cool and dry storage
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76 Quarry Road :: Wolcott, VT 05680 :: phone: 802-472-6174 :: fax: 802-472-3201