SPARAGUS IN THE ARDEN Dan Drost  Extension V egetable Specialist August  HG UMMARY Asparagus pref ers a sunny locat ion and fe rti le wel l drai ned soil s
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SPARAGUS IN THE ARDEN Dan Drost Extension V egetable Specialist August HG UMMARY Asparagus pref ers a sunny locat ion and fe rti le wel l drai ned soil s

Inc orporat e plent y of organi c matter and pho spho rus fertilize r into the area b efore p lanting Plant a spara gus c row ns 12 inche s apa rt in 8 inch deep furrows in early spring Cover the c owns with 2 inches of so l and s owly fi l the fur

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SPARAGUS IN THE ARDEN Dan Drost Extension V egetable Specialist August HG UMMARY Asparagus pref ers a sunny locat ion and fe rti le wel l drai ned soil s




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Presentation on theme: "SPARAGUS IN THE ARDEN Dan Drost Extension V egetable Specialist August HG UMMARY Asparagus pref ers a sunny locat ion and fe rti le wel l drai ned soil s"‚ÄĒ Presentation transcript:


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SPARAGUS IN THE ARDEN Dan Drost , Extension V egetable Specialist August 2003 HG-2003-04 UMMARY Asparagus pref ers a sunny locat ion and fe rti le, wel l drai ned soil s. Inc orporat e plent y of organi c matter and pho spho rus fertilize r into the area b efore p lanting . Plant a spara gus c row ns 12 inche s apa rt in 8 inch deep furrows in early spring. Cover the c owns with 2 inches of so l and s owly fi l the fur ows over the est of the summer. Fert liz the pla nts w ith nitrog en afte r the fern is estab lished and w er reg ularly th roug hou t the sum mer. C ontro l

all pests during t he establ ishment yea rs. Harve st al l emergi ng asparagus spears f or 4 weeks beginni ng 2 years af ter pl anting. Harve st can be 6-8 week s in following y ears. After harve st, fertil ize and w ater the plants to enco urage go od fern growth and cont rol pes ts. When fern die i n the fa ll, mow and mulch them on the beds . Newer all male vari etie s li ke Jersey Giant and Jerse y Knight perf orm well i n Utah. ECOMMENDED ARIETIES Try these newer asparagus varie ties which are ver y producti ve. Mary Washington is no longer recommended. Var iety Yie ld Com me nts Jersey

Giant Excellent Larg e, dark green spea rs, goo d dise ase re sistanc e, all-ma le varie ty Jersey Knight Excellent Larg e, dark green spea rs, goo d dise ase re sistanc e, all-ma le varie ty UC 157 F1 Excellent Larg e, pale green spea rs, goo d dise ase re sistanc e, ma le/fem ale plan ts Purple Pas sion Good Larg e, dark purp le spea rs, ma le/fem ale plan ts OW TO ROW Soils: Asparagus pref ers or ganic, rich, well-dr ained, sandy soil s for be st gr owth. Most soil s will do provided they are well draine d. Soil Preparat ion : Befo re plan ting, co ntrol all pe renn ial we eds. In corp

orate 2 -4 inch es of w ell com poste d org anic matter. Apply 1/2 pounds of high phosphate (11-52-0) ferti lizer per 100 square feet of planted area. Work compost and ferti izer in o soil to a depth of 6 nches. Plants: Purchase qual ity 1 year-ol d crowns from l ocal gar den center s or seed catal ogs. Crowns shoul d have 8-10 large roots and a healt hy bud clust er. You may als o establ ish aspar agus fr om transpl ants gr own from seed. Pl ant seed in Jan uary for trans plantin g in A pril. Plant ing and Spaci ng : Asp aragu s crow ns sh ould b e plan ted in 8 inch d eep fu rrow s in A pril

(Figu re 1). Sp ace p lants 12 inches ap rt n the row, with rows 3-4 feet apart. Cover cr wns with 2 nches of so l. Add add tional soil to he furrow b y cultivation during the year but do not bury thos e fern alrea dy establ ished. Water: Du ring the first 2 yea rs after pla nting w ater freq uen tly by su pplyin g 1 to 2 inche s per w eek in one a pplica tion. U se drip irr igati on if pos sibl e. Mulch around t he plant with compost or grass cl ippings to conser ve soil moistur e and reduce weed growth. I rri gation can be reduced t o every 2-3 weeks after year 4. Irrigate so tha t moistu re

goe s dow n to 4 fe et in the s oil. Ferti li zati on: After har vest, fert ili ze with a compl ete f erti lize (16-1 6-8) u sing a bou t 3/4 lb. pe r 100 squa re feet.
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Estab lishmen t: Maintain heal thy fer n growth duri ng the fi rst 2 years t o ensure as paragus pr oduces for a long t ime. Control weeds and insect s. Water deepl y to ensur e good root growth. Do not ha rvest asparagus until the 2 nd year after pla nting. ROBLE MS eeds: Control all per ennial weeds and grasses in asparagus. Mulch asparagus he avily (2-3 i nches) with compost each year. "Round-up" herbi cide

may be appl ied t o weeds before or afte r the ha rvest period. Avoid sprayi ng "Rou nd-up" o n asparag us plants. A void tilling asparagu s as dam age to the roo ts may oc cur. Insects De sc ri pt on an d S ymp oms Control Asparagus a hid Green plant sucking i nsects t hat st unt fer n and reduce yield and p lant vigor. Use insect icida l soaps or label ed insec ticides. Asparagus b etle Be etles are black or oran ge an d hav e 6 or 1 2 spo ts on the ir wings. Larvae feed on f ern which re duces leaf area and plant vigor. Adults f eed on emerging s pears i n spri ng. Us ed ins ecticide s

labele d for this pest. Diseases Sy mpt oms Control Root Rot d iseases Fung al diseases redu ce plant vigor an d stands. Tips of fern turn ye llow, g row ing po ints die, w hole s tems and p lants eventual ly die . Spears are smal l and ski nny. Reduce plant s tres s. St resses include insect s, over -wateri ng, over cutting , droug ht, and we ed pre ssure . Viruses Viruses caus e plant s to decl ine and di e and yiel ds to go dow n. Control a phids which t ransmit the disease. ARVEST AND TORAGE Harvesting: Asparagus harvest begins 2 years after planti ng. Plants may be harvested for up to 4

weeks the first year. Cu t 9 inch tall spears at groun d level. Remove all eme rging spears d uring harve st since tall growing spears suppress further spear grow th. Harves t for 6-8 wee ks from ye ar 5. Stop harv esting wh en the m ajority of spears are smaller than a p encil in diameter. After Harvest Plant Care: After h arves t is com pleted , contro l weeds and then al low spears t o develop i nto fer n. Fert ili ze the bed s, wa ter regu larly, an d con trol pests . After fe rns die in the fall, mow them down and use as a soil mulch. Avoid il ing asparagus be ds since this damages the cr

own. Productivi ty: A ma ur e a sp ar ag us pl an ca n p ro du ce Ĺ t o ĺ pou nd o f spea rs durin g the c omp lete har vest p eriod. P lant approximat ely 20 pl ants per famil y member in order to have sufficien t spears for fresh cons ump tion an d stora ge pu rpose s. Spears wil l st ore for 3-5 days under refr igerat ion. REQUENTLY SKED UESTIONS How long will asparagus last Expect the plant to produce spears for 10-15 years. Why are the spear s al ways ski nny Plants may have been water s tres sed last summer when the spear s formed or the plant d id not sto re eno ugh food for goo d spe

ar grow th. As the ha rvest se ason prog resses spea r size na turally decreases. Can you harv est aspara gus at other ti mes of t he year besi de spr ing You can but general ly the se plant s do not yield well and t he li fe span of the bed i s great ly reduc ed. Can you grow white asparagus i n Utah Yes but you need t o mound soil ove r the pl anted bed and t hen cut t he spea rs just as th ey po ke thro ugh the so il. If light gets to the sp ear it w ill turn gree n. U se blac k plas tic in the sp ring to cov er the b eds. T his w ill keep th e light ou t. Utah S tate University is com

mitted to provid ing an env ironmen t free from haras sment an d other form s of illegal discrimination based o n race, color, religion , sex, natio nal orig in, age (4 0 and older), d isability, and veteran ís status. U SU ís policy also pr ohibits d iscrimin ation o n the b asis of se xual o rientation in employment and academ ic relat ed practices and deci sions. Utah State U nivers ity emp loyees and s tuden ts cann ot, beca use o f race, co lor, religion , sex, natio nal orig in, age, d isability, or v eteranís status, refu se to hire; discha rge; pr omote; demote ; te rminate ; dis

crimina te i n compensati on; or di scri minate r egardi ng terms, privi leges , or condi tions of employment, agains t any person ot her wise qua lif ied. Employees and st udents a lso ca nnot dis crimina te i n the cl assroom, r eside nce hall s, or i n on/off campus, USU-sponsored eve nts and acti viti es. Thi s publi cati on is i ssued i n furt herance of Cooperati ve Extensi on work. Acts of May 8 and June 30, 1914, i n cooperat ion with t he U.S. Depart ment of Ag ricu lture , Jack M . Pay ne, V ice P resid ent a nd D irecto r, Co ope rativ e E xten sion Ser vice , Uta h S tate U nive

rsity.